Kog'Maw Build Guide

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Kog'Maw AD, AS, AP Full Build Penta Kill Picture

written by Senor Fun

Kog'Maw Build

Table of Contents

  • Introduction

    Though Kog is the epitome of squishy he is one of the best carries that I have ever seen and played as.

    In this guide I will be going over the many ways in which you can build and play Kog'Maw.

    This guide is consisting of the three Kog builds:
    Attack Speed, Attack Damage, and Ability Power

    I will be referring to each of these builds as AS, AD, and AP

    This guide will also consist of situational builds and items.

  • THIS BUILD WORKS!! (read the stats below)

    Here's a screen shot of a penta-kill i got with the AS build with full items. My team was doing awful and it got to the point where i told them if they could do everything they possibly could to keep them off of me we would win the game. They started to listen and i pulled our team through and managed to get full items on Kog for the first time ever and as you see the damage is ridiculous.

    Bio-Arcane Barrage was dealing 8% max health magic damage along with the 4% max health magic damage from madreds. Then with around 31% crit chance and 445 attack damage i was critting quite often for around 700. Also i had 50% life steal. So Kog is officially the master of hybrid. There is no building against him because he will reign hell upon all who oppose him. MUAHAHAHAHAHA

    External Image

  • Updates


  • Abilities

    Icathian Surprise
    Icathian Surprise: Upon dying, Kog'Maw starts a chain reaction in his body which causes him to move faster and detonate after 4 seconds; dealing 100 + (25 x lvl) true damage to surrounding enemies

    Something I see a lot of Kog'Maw's forget about their passive. This is something that you want to get used to. Kog is a slow champion and dishes out a lot of damage so therefore you will get targeted a lot. There will be many times you will get targeted and will realize you're not going to get out of a situation alive. DONT RUN stay and fight and take someone to as low as health as you can. If you die that is what your passive is for. Return the favor!

    Caustic Spittle
    Caustic Spittle: Passive: Increases Kog'Maw's attack speed. Active: Kog'Maw launches a corrosive projectile which deals magic damage and corrodes the target's armor for 4 seconds.
    Passive: Increases Attack Speed by 10/15/20/25/30%.
    Active: Kog'Maw launches a corrosive projectile which deals 60/110/160/210/260 (+0.7) magic damage and reduces the target's armor by 5/10/15/20/25.
    Mana Cost: 60
    Range: 625

    Caustic Spittle is a great skill. For the AD build it is the core skill. Withering away a targets armor and gaining 30% attack speed with some damage is awesome. When Fighting as AD Kog you want to use this skill instantly to lower your enemies armor so you can wither them away even more.

    Bio-Arcane Barrage
    Bio-Arcane Barrage: Kog'Maw's attacks gain range and deal a percent of the target's maximum health as magic damage.
    Kog'Maw's attacks gain 130/160/190/220/250 range and deal additional magic damage equal to 2/3/4/5/6% (+0.01)% of the target's maximum Health (Max: 100 Damage vs Monsters). Lasts 10 seconds.
    Mana Cost: 50

    Bio-Arcane Barrage is the best Kog skill by far. You get an unfair attack range with health percent damage. Put a [item_icon=Madred's Bloodrazor] in your build and you will sit back and watch as you wither away your enemy.

    Void Ooze
    Void Ooze: Kog'Maw launches a peculiar ooze which damages all enemies it passes through and leaves a trail which slows enemies who stand on it.
    Kog'Maw launches ooze which deals 60/110/160/210/260 (+0.7) magic damage to enemies it passes through.
    Additionally, it leaves a trail which slows enemies by 28/36/44/52/60% for 4 seconds.
    Mana Cost: 80/90/100/110/120
    Range: 1100

    Void Ooze is the main skill for early game laning with Kog. It does a decent amount of damage, slows, and hits multiple enemies. Only downside is it's a slow ball rolling forward so enemy champions are able to dodge this if they stay back. as for saving Kog's ass it's very nice. Since Kog is so slow it's a nice move to place well and use to get away.

    Living Artillery
    Living Artillery: Kog'Maw fires a living artillery shell at a great distance dealing damage and revealing targets. Additionally, multiple Living Artilleries in a short period of time cause them to cost additional mana.
    Kog'Maw fires artillery from a great distance. After a short delay, the artillery falls dealing 80/120/160 magic damage and reveals targets for 4 seconds (deals 150% bonus damage to Champions).
    Each subsequent Living Artillery in the next 6 seconds costs 40/40/40 additional mana (Max 200)
    Mana Cost: 40
    Range: 1200/1600/2000

    My favorite ults in the entire game. This gives you a restricted but unlimited Clairvoyance. It will tear through your enemy early game whether you are building AD, AS, or AP. The most useful part of this spell is that it gives vision of your enemy for 4 seconds. Since you have such a long range with Bio-Arcane Barrage you can mix it very well with Living Artillery. Especially in forest and brush fights.

  • Quick Builds If you're too lazy to read

    Keep in mind these are not strict builds they are only quick suggestions if you don't have time to read the full guide. You can also alternate the order you get these items.


    Summoner Spells:

    Masteries: 22/0/8


    Summoner Spells:

    Masteries: 21/0/9


    Summoner Spells:

    Masteries: 9/0/21

  • AD Build

    ALL YOU AD KOG PLAYERS SHOULD BE HAPPY NOW!!! AD has been added to Living Artillery scaling!!

    AD is an extremely viable build for Kog. Something that this build has to offer that is key is the fact that you will be able to take towers down quick from affar. There are some situations as to why you should should AD Kog'Maw.

    1)You're playing a ranked match and your team wonderfully decided to choose an all magic damage team. Being Kog you're the only champion on your team viable of dishing out physical damage.

    2)You feel like it

    3)The other team is getting a lot of magic resist.

    Masteries: 22/0/8

    Skill Order:

    The reason you max out Caustic Spittle first is because it gives you great attack speed and takes some armor away from the enemy. The range isn't too great on Caustic Spittle but place yourself well so that you can effectively use it and not die.
    The reason you max out Bio-Arcane Barrage next is because you need the range and magic damage (even though you are AD Kog). This will effectively put you at a great position in all team fights.
    The reason you max Void Ooze last is because if you place it well you won't need much more slow going on for the enemy because he will walk the whole line very very slowly. Plus you will have a lot of damage by the time you max this out and you will kill them before they even get to you.

  • AD Laning Phase

    The first item to get when building Kog is Vampiric Scepter

    You start out with Vampiric Scepter because you will later be building it into a The Bloodthirster later in the game. It's also great to keep you in the lane longer. And since you're AD Kog you shouldn't be blowing your mana.

    Do your best to last hit the minions because you're going to want to get your Berserker's Greaves and Zeal as soon as you can.

    Buy your Berserker's Greaves and if you can get a part of Zeal get the Brawler's Gloves first. You're build should look like this so far.

    **Update** You must be pretty happy right now because Living Artillery now scale with AD which is AMAZING. So all you AD Kog lovers just became even more viable.

    *The best way to get a kill at level 6 with Kog is by using Living Artillery followed by Void Ooze and some attacks and possibly a last hit with Living Artillery

  • AD Mid Game

    It's now getting to the point where champions are walking the map and ganks are inevitable. You may par-take in this fun and enjoy walking the map. When you decide to start walking the map and ganking the key skill order no matter which build involves a quick Living Artillery followed by a Void Ooze to cut off the enemy from running. Always put Void Ooze behind the enemy so you cage them in.

    Around this point of the game you have to decide which way the other team is building and how effective their damage is. You should have finished your Phantom Dancer.

    If the other team is building a lot of armor you're going to want to rush a The Black Cleaver at this point.

    If the other team is NOT building heavy armor you should get your Frozen Mallet next.

    This item is key for Kog and when mixed with Bio-Arcane Barrage it is unstoppable.

    If you needed to get the black cleaver first you're going to want to really watch yourself during team fights. You're not going to have much health at this time so you're going to have to live. But as soon as you finish your The Black Cleaver you're going to want to go for the Frozen Mallet for the perma-slow and health. Also if you decide to get the black cleaver first you're going to want to get the lizard buff constantly to increase your likely-hood of getting kills.


  • AD Late Game

    Ok so shit's getting crazy now. Everyone is started to get close to full items so you should too!
    Team fights are going to stay the same but you need to finish your items NAO!

    First item to finish? The Bloodthirster

    Next up on the list is either Infinity Edge or Last Whisper

    Normally you will be getting the Infinity Edge but there will be occasions where you are carrying your team and the other team will have a lot of armor. In this case you get Last Whisper. You will still be doing good damage and you will eat through anyone with armor. At this point of the game if they really let a Kog'Maw get to full items there shouldn't be any reason your team doesn't win.

    If you don't have to worry about getting the Last Whisper then get your Infinity Edge and finish out the game.

    Now if you mana to get to the point where you have full items and full elixers and a lot of extra gold sell your Berserker's Greaves and get another Phantom Dancer. This won't happen very often. This has happened to me a few times during ranked games considering i'm playing against better people and the games last longer.


  • AD Build Items NOT to Get

    Manamune You aren't going to be using very much of your mana and this is just a waste of an item slot.

    Youmuu's Ghostblade it's not a horrible item for AD Kog but there are different weapons you should get that will fill out your damage, crit and arm pen.

    Trinity Force you're already getting a Phantom Dancer and a Frozen Mallet so this is useless.

  • AD Runes


    Of course you get these! When you have all 9 of them you will start the game off with a whole 15% attack speed. Along with your Vampiric Scepter it will do you justice throughout the game.


    The reason you want this bit of mana regen is because throughout the game Kog has a bit of a manage problem if you're going crazy and blowing all your skills. This mana regen will give you a consistent amount of mana throughout the whole game since your main spells are Bio-Arcane Barrage and Caustic Spittle. You won't have to worry about many this way.


    There isn't really an AMAZING Glyph for AD Kog. You should go this though because you will get more crit damage on top of your Infinity Edge and [mastery=lethality] which is always a good thing. Yay more damage!!


    Simply more armor pen to eat through more armor on-top of your The Black Cleaver Caustic Spittle and Last Whisper if you got one.

  • AS Build

    AS Kog'Maw has to be the best build (in my opinion). The amount of percent damage you will do is incredible.

    Masteries: 21/0/9

    Skill order:

    You max out Bio-Arcane Barrage first because it is going to be the bulk of your damage.
    You max out Caustic Spittle next because you want lots of attack speed.
    You max out Void Ooze next for the same reason you do for the AD build.

  • AS Laning Phase

    Start off the same way you do with the AD build by getting a Vampiric Scepter.

    Now i know you're going crazy because i'm suggesting to get a vampiric scepter but it is with good reason and you will be building into atleast one The Bloodthirster later on.

    While in the lane you're going to want to do your best to conserve your mana but at the same time harass a little with your Bio-Arcane Barrage. Be careful though because the minions will attack you when you do this. So just harass with an attack or two and get your health back. (this harassment is best for AS early game and this is yet another reason you get the Vampiric Scepter

    When you go back for the first time you want to have 1000 gold and you have to ask yourself one question.

    How badly am i getting harassed in my lane?

    If you aren't getting harassed badly or at all you should go for the Madred's Razors. Getting this right away will enable you to farm quicker and get your lizard buff earlier. If you are getting harassed, though, you should get your Berserker's Greaves so you can run away better. After asking yourself this question your build will look like either of these.

    Getting Harassed[builder=Kog'Maw/72d4ce41575b1ec0bd315cbdbeaaed1f]
    Doing the Harassing[builder=Kog'Maw/c948bb9bb3203907cc0090a8908d1271]

    When you return and reach level 6 you can do exactly what you do with the other two builds.
    *The best way to get a kill at level 6 with Kog is by using Living Artillery followed by Void Ooze and some attacks and possibly a last hit with Living Artillery

  • AS Mid Game

    At this point you will start to walk the map and ganking. In order to gank with the best success initiate with Living Artillery from the side and quickly draw a line behind the enemy with Void Ooze so you can bot the enemy champion in. Continue to mow them down with Bio-Arcane Barrage and the gank will be successful.

    The items you build for the AS build is a little more strict than that of the AD build. With As build you instantly want to build your [item=madred's bloodrazor] after your Berserker's Greaves. When building the [item=madred's bloodrazor] you're going to want to build in this order.
    Madred's Razors--> Recurve Bow--> Pickaxe
    Since you're relying on your Bio-Arcane Barrage for damage the attack speed is a priority over the attack damage.

    Things should look like this so far

    The next item you're going to be building is a Frozen Mallet

    Especially with the AS build the combo of [item=madred's bloodrazor], Bio-Arcane Barrage and Frozen Mallet is unstoppable. Frozen mallet is Kog's favorite item because it makes him create a perma-slow along with giving him health he desperately needs.

    With your Frozen Mallet Added

    I know you're getting antsy with your Vampiric Scepter but it's not gonna be a The Bloodthirster just yet!

    **Since the new Kog buff to Caustic Spittle [item=malady] has become slightly less necessary. Keeping that high attack speed along with the damage, it is much better to replace the [item=malady] with a Guinsoo's Rageblade. Especially now since his ult scales with AD.

    With your new best friend added

  • AS Late Game

    Like the AD build shit's getting crazy again! And you finally get to make a bloodthirster!!!!

    After getting your Bloodthirster

    You are not only doing 11% max health damage now but you are starting to do physical.
    The reason I get a The Bloodthirster is because you already do enough magic damage with kog with the other four items and a blood thirster gives you a good amount of attack damage along with good lifesteal. It also makes killing towers easier. Another reason you get a The Bloodthirster is because you will be mowing through tanks with all your health% damage. The Bloodthirster is mainly for everyone else.

    The last item you will be building is up to you. You should definitely look at the other team and decide mostly if you need a Void Staff or not. If you don't need a Void Staff then get another The Bloodthirster to finish the game.

    **Update** Since magic pen has been added to Caustic Spittle the Void Staff has become less necessary. I wouldn't suggest a Void Staff unless you're looking at the most unbelievable amount of MR on the enemy team.

    Need some magic pen? That tank have too much magic resist?
    ***This will almost never be an item you get. The only time you will be getting this is if they hate you so much to the point that you're looking at atleast 3-4 enemy teammates building MR against you.

    With these full items and getting all the elixers you will have almost 3k health and around 2.04 attack speed which is exactly what you want.

    If you can fully buy one. Copy what I said in the AD late game and grab a Phantom Dancer in place of your boots.

    Extreme late game build

  • AS Build Items NOT to Get

    every other attack speed item. with full items you will already have 2 attacks per second and trying to get to the cap of 2.5 isn't worth it. If you do this you're wasting item slots.

  • AS Runes


    You want this for the same reason you want it for the AD build. You get 15% attack speed at the start of the game. It also helps you get to the 2 attacks per second with full items and elixers.


    Same reason as AD build. You won't be using much of your mana but you will be using some and this straight mana regen will hold up for the entirety of the game.


    Now this is something I love. At the end of the game, even if you decide to go the two The Bloodthirster and not the Void Staff you will get just enough AP from your [item=malady] and 9 Greater Glyph of Force that your Bio-Arcane Barrage will get an extra 1% damage making each attack deal 11% of the targets maximum health. You will love this little extra just as much as I do.


    The reason you get these quintessence is because the little bit of cooldown you get will make a significant difference because you want to keep your Bio-Arcane Barrage up as often as you can.

  • AP Build

    Kog's AP build is a very viable build that makes withering your enemies with Living Artillery very easy and makes the health % damage you get from Bio-Arcane Barrage much better even though you don't have a lot of attack speed.

    I'm not a huge fan of AP build because i play my best with AS but i have played as AP kog before and he's very strong.

    Masteries: 9/0/21

    Skill Order:

    The reason you max out Void Ooze first is because it has the longest range with the best effect levels 1-5. this is the best attack you can harass with while staying at a safe distance. Plus it will hit the creeps too.
    The reason you max out Bio-Arcane Barrage next is because you will get some nice damage added to the already 6%max health damage due to your AP items.
    The reason you max out Caustic Spittle last is because you're not using the build to get up close and attack fast. The number one thing about the Kog AP build is you're supposed to stay far back during fights.

  • AP Laning Phase

    Laning Phase with Kog is something that you will find a lot easier to do than the other two builds. The reason being is because you will be harassing with Void Ooze and dealing some significant damage to keep the enemy champions off your back.

    So your first time out you're going to want to start with a Sapphire Crystal and two Health Potion
    Why you get the Sapphire Crystal instead of [item=meki pendant] is because you will have along with Meditation that will cover your mana regen needs for early game.


    During your laning phase your going to want to conserve mana but still harass with Void Ooze because you're going to want to have enough mana for spamming Bio-Arcane Barrage when you hit six.

    In-order to get a kill Laning Phase with Kog it's the same as the other two builds.
    *The best way to get a kill at level 6 with Kog is by using Living Artillery followed by Void Ooze and some attacks and possibly a last hit with Living Artillery

    When you go back for the first time to get your items something key to get with AP Kog is a Tear of the Goddess for early game mana. You don't have to build this into an Archangel's Staff until later because admittedly there are better items for you to get AP from and this item is more of a mana thing anyways.
    And if you have enough gold left you're going to want to get your boots. I doubt you can fully buy Sorcerer's Shoes unless you built up a lot of gold so if you can't just buy Boots of Speed

    Build should look something like this (assuming you couldn't buy Sorcerer's Shoes

    Go back to your lane and start bombing the chirst out of people. Build some stacks on that Tear of the Goddess because you're going to need the mana.

    The next time you go back it should be getting pretty close to the end of laning phase. At this point you should have your Sorcerer's Shoes finished. Once those are finished start building a Haunting Guise by starting with an [item=ability tome].

    It's about the end of laning phase so your build should look something like this.

  • AP Mid Game

    Now is the time where everyone is walking the map and ganks are happening. AP Kog isn't the best at taking down towers but he is great for team fights so if your team decideds they want to push a tower join their ranks and push with them because something AP Kog is great at doing is withering away enemy champions hugging their towers. This way if you and your team is pushing a tower and there are some enemy champions hugging the tower just bomb them a bunch of them to low enough health that you guys can tower dive them.

    When you start building your items during the Mid Game you're still not going to want to build a Rylai's Crystal Scepter right after you finish your Sorcerer's Shoes. The importance of this item is just as significant as the Frozen Mallet is in the AD and AS build. PERMA SLOW!!! except the perma slow from Rylai's Crystal Scepter is a lot funnier. You will perma slow an enemy and kill them and you won't even be anywhere in sight. If you get really good at this you will hear a lot of "KOG IS SO OP" "KOG IS THE GAYEST CHAMPION EVER" along with some enemy champions rage quitting.

    So your item build should look like this

    After this your will start getting a lot of kills a lot easier and the next item you want to get is finish your Archangel's Staff

    From here on you're going to have a pretty replenishable amount of mana but even if you built all the mana in the world AP Kog still runs out of mana so you're going to want to get that Golem Buff as often as you can so you can stay and fight as long as possible.

    At this point you're going to want to decide whether or not getting a Void Staff is worth it. If the team isn't building heavy magic resist against you I would suggest going for a [item=malady] instead. It gives you that extra bit of magic resistance that will cause you to deal true damage or almost true damage to enemy champions with Bio-Arcane Barrage. At this point sell your Haunting Guise to either buy your [item=malady] or Void Staff or to buy the Blasting Wand to start on your deathcap.

    With the Void Staff

    With the [item=malady]

  • AP Late Game

    Late game with AP Kog is pretty fun. Your ult will start doing a ridiculous amount of damage and pissing the enemy off because you won't even be in sight.

    The next item you're going to want to get is the cliche Rabadon's Deathcap for the AP build.
    Should look like one of these two.

    Playing AP Kog isn't very different than the way you've been playing the whole game. Pretty much stay back and bomb with Living Artillery.

    The last item is kind of what you would like to add. I prefer to go for the Zhonya's Hourglass because it gives you the most AP other than another Rabadon's Deathcap with some armor and an awesome active. The active is very useful because if you get caught in a bad situation you can use the passive and hope your team helps you out because Kog doesn't really have an awesome ability to get away because he's so slow.

    In my opinion your ending build should look like one of these.

  • AP What Items NOT to Get

    Don't get any cool down reduction items because the move you'll be using the most is Living Artillery and it already has a low cooldown and will blow more of your mana if you spam it more.

    You don't really need a Rod of Ages because the mana you get from Archangel's Staff is more than enough

    One item you may consider but i suggest not to get is an Abyssal Scepter because you won't be close enough to the enemy to have them eat the debuff of this item.

  • AP Runes

    You're going to want to get this because you want as much magic pen you can get.

    You want this Seal because the mana regen you will get will make harassing early game easy without losing a lot of mana and because of this seal you will get the Sapphire Crystal as opposed to the [item=meki pendant]

    You will get this Glyph because it will give you an extra 28AP at level 18 and that's just more firepower for you.

    You get this because you want a little bit of CDR because your Void Ooze has a very long CD.

  • Continued......

    The AP section has been finished and now I am working on my Champion Reactions portion. Considering the magnitude of this guide already i have decided to create a separate guide for the champion reactions.

    Please comment and rate my guide!!!!!

    special thanks to the League Of Legends Community

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