Kog'Maw Build Guide by Makaiton

This build has been archived and is for historical display only.

PLEASE NOTE: This build has been archived by the author. They are no longer supporting nor updating this build and it may have become outdated. As such, voting and commenting have been disabled and it no longer appears in regular search results.

Not Updated For Current Season

This guide has not yet been updated for the current season. Please keep this in mind while reading. You can see the most recently updated guides on the browse guides page.

League of Legends Build Guide Author Makaiton

Limb-Melting Kog'Maw

Makaiton Last updated on September 19, 2012
Like Build on Facebook Tweet This Build Share This Build on Reddit

Ability Sequence

Ability Key Q
Ability Key W
Ability Key E
Ability Key R

Not Updated For Current Season

The masteries shown here are not yet updated for the current season, the guide author needs to set up the new masteries. As such, they will be different than the masteries you see in-game.



Offense: 29

Honor Guard

Defense: 0

Strength of Spirit

Utility: 1

Guide Top


For all intents and purposes, this guide is to be considered unfinished. I haven't even gotten through the item build yet, much less started typing out all the number crunching necessary to understand the build.

Guide Top

Welcome to the Void

There are two readily acceptable builds for Kog'Maw: a straight AP build which my friends and I
know as Face-Melting Kog and the far more popular AD build also known as Limb-Tearing Kog. Both of these builds allow the champion to shine as a carry. Both can dish up very large amounts of damage in very little time while still having a lot of fun-factor to them. Each skill has several different uses and is very entertaining to use, starting from Kog's Caustic Spittle all the way to his Living Artillery.

This guide, however, focuses on one of Kog's most under utilized skills: Bio-Arcane Barrage.

Guide Top

Bio-Arcane Barrage Utilization

Now, that isn't to say that AD or AP Kog'maw doesn't use this wonderful, tank-melting ability. On the
contrary, they do, and well. However, as Bio-Arcane Barrage has two distinct aspects to it, both builds can only really focus on one.

Given that simple idea, let's expand upon what those aspects are and how each build uses them:

Autoattack Aspect
Bio-Arcane Barrage is an ability that works in tandem with your autoattacks. When it is activated, it increases your attack range by a large amount and also enhances the damage you do with those autoattacks. Each attack does standard damage based off of AD, but is also granted additional Magic Damage for 8 seconds. As might seem obvious to some of us, being able to hit the enemy many times during the duration of the ability is a very, very good thing. Limb-Tearing Kog may have an Attack Speed as high as 2.00 (or even higher), meaning that it can hit an enemy as many as sixteen times before the skill expires!
Max Health Damage Aspect
Bio-Arcane Barrage allows adds additional damage to your attacks in the form of magic damage based on the target's max health. It starts at %2 of the target's max health and maxes out at 6%, and that's without considering how AP stacks on the ability. For every 1 Ability Power Kog'Maw has, the Magic Damage of this skill increases by 0.01% (while being rounded up to the nearest percent for every 50 AP). This means that a good Face-Melting Kog (with a little over 900 Ability Power) can increase the per maximum health damage by 18%, totaling to 24% of a target's life per hit.

Without going into a lot of numbers, which I will be doing later, each approach to playing Kog'Maw has
Bio-Arcane Barrage causing a lot of damage. The question then becomes which is better? Or rather, at this point in time the question is becoming "When will this guy get to the point?"

Well, all in good time. First, let us learn about the things that no one can change about Kog.

Guide Top

Mad Skizzyles, Yo!

The only thing that Kog'Maw's skills all have in common is that they involve his insatiable digestive
tract. Each ability has a very unique aspect and use. Given that not everyone has been playing nothing but Kog'Maw for the last six or seven months straight, let's go over Kog's abilities and what they can do for you.

Icathian Surprise is as surprising a passive as its name indicates. Upon death,
Kog'Maw becomes a ticking time bomb, doing more and more damage with each level. At 18th level, Kog deals a massive 550 True Damage, meaning that the damage that champions receive from the explosion can not be mitigated; Magic Resistance and Armor have absolutely no effect on this. It is alleged that this is not the best passive in all of League of Legends, likely due to the fact that Kog'Maw must die in order for it to take effect...but when used correctly, will make all the difference in team fights or ganks.

For example, when being ganked, it is often better to turn and fight the gank
instead of trying to escape it. If you've planned far enough ahead in the five seconds it requires for you to die (Kog is squishy, remember), you can easily get a kill, or if you're lucky, a double or triple kill (depending on who you're being ganked by). In team fights, if you somehow find yourself smack dab in the middle of a 5v5, your explosion can easily setup the rest of your team to clean up and come out on top. Targeting the lowest health enemy that is running away is not always the best decision, although it may get you another kill. Consider, instead, hitting multiple enemies grouped together to assist your allies in winning a team fight.

Caustic Spittle seems like the one active ability Kog possesses that matters the
least, but I assure you that this is not the case. While it doesn't do massive, game-ending damage to a single or multiple enemies, it's high AP to damage ratio of 0.7 lets Kog deal out decent enough damage to an individual champion while reducing their Armor for the duration of the debuff it causes. Early on in the match, this is also an excellent ability for last hitting on minions where your attack speed is not quite what it could be. This skill is exceptionally useful when you're ganking: hit an enemy with this, activate Bio-Arcane Barrage, and let your autoattacks just melt the enemy champion. It's also very good for focusing carries in team fights.

Let us not forget, though, that the passive effect of this skill increases Kog'Maw's
Attack Speed, though. At level 5, this ability increases Kog's Attack Speed by a staggering 30%!

Since I've already covered Bio-Arcane Barrage pretty extensively, I'm not going
to regurgitate (hahah, Kog'Maw!) an explanation of how it works and why it's a great ability. Some tactics you want to consider using this ability for include the following: early game harass, pokes, last hitting minions, and tank-melting. Remember that this ability gives Kog'Maw a massive range boost, allowing you to out-range just about every champion in League. You can also utilize this skill to quickly tear down super-minions.

Void Ooze is an immensely useful skill, with a large number of diverse uses. This
ability is a skill shot, meaning you need to anticipate the enemy in order to use it effectively. That also makes it a thousand times more useful.

For example, let's say that one of your allies is being chased. You can strategically
place your Void Ooze to be in the path between your ally in need and the offending enemy champion, effectively blocking off their route of pursuit. You can also use this skill to last hit many minions at once. In fact, by the time this ability is level 5 (using this build) you'll be able to one-hit an entire mass of minions, granting you great farming ability mid-game.

Since Void Ooze scales at a rate of 0.7 to every 1 Ability Point that you have, it
will easily do 600 damage to any enemy champions in its path. It is a bit Mana hungry, though, so use it judicially, especially early game.

Finally, Kog's best ability (well, it's his Ultimate, so duh), Living Artillery. At level
1, this ability does a huge amount of damage to enemy champions, effectively allowing you to gank and feed early game. At level 3, it still does good damage (not quite as effective at this point in the game, however), but where it really shines is in its range. Living Artillery, at level 3, has such range that it can target areas out of sight range.

Since it grants sight twice, once at the start of use before it hits an enemy and
once for a small duration upon hitting an enemy, minion, or monster, this ability can also be used very effectively for safely scouting bushes, Dragon, Baron, and dark shadowy corners of the map. It's also very, very, very good at preventing enemy champions from recalling to safety (imagine how much they're swearing at you when you interrupt their recall while taking a good quarter of their life out).

Living Artillery scales both with AD and AP at a rate of 0.5 to each, it can benefit
from whichever build you decide to use. Remember, though, that for each successive use of the ability within six seconds of your last using it, its Mana cost increases by 50. Since this build doesn't grant unending amounts of Mana, it's a good idea to use it only when it will truly be effective.

So, now you know. And, of course, knowing is half the battle!

Guide Top

All In For the Win!

Just in case your eyes didn't bug out of your skull and the memory of such a fantastically ridiculous
Mastery build was forever burned into your brain, allow me to remind everyone here what is called for:


This is obviously not any kind of standard Mastery selection, and that is well and good, as Kog'maw is
not any sort of cardboard cut-out copy. The slobbering vomit monster has a whole lot of range and versatility, allowing you to effectively harass the opposition with or without Mana. A good AP Kog build will probably focus on getting very large amounts of Mana so as to spam Living Artillery, but this build doesn't require you to waste your Masteries on Utility.

As is the theme in this build, Masteries are setup to functionally give Kog'Maw Attack Speed, a tiny bit
of Attack Damage, and a decent amount of Ability Power. This helps Kog'Maw farm in lane, enhancing his autoattack, his Void Ooze and Caustic Spittle with the AP, Living Artillery with both AP and AD, and (most importantly) the Bio-Arcane Barrage with absolutely (almost) every Mastery chosen.

The single Mastery over in Utility is for the most obvious of things; reduced cooldowns on Flash and
increased Mana replenishment through Clarity sort of explains itself.

As for Rune selection...


Greater Mark of Attack Speed

Greater Seal of Attack Speed

Greater Glyph of Attack Speed

Greater Quintessence of Attack Speed

Yes, you should notice a theme in this Rune page. No, the theme is not Critical Strike or Magic Resist,
even though I know both of those make so much sense for Kog (and understand how you could have made that mistake, seeing as how every Rune is of Alacrity). However, Attack Speed is the only thing we shall give to Kog through our Runes, as that is all that is necessary to make the champion ridiculously powerful.

The reasoning behind the absolutely all-in approach to the Runes is very simple. Kog'Maw gets a
reasonable attack speed through his per level increase and the passive effect of Caustic Spittle. With pure Attack Speed runes, Kog'Maw need only get two of Nashor's Tooth in order to reach an Attack Speed of 2.00. I can hear the burning question "But why two of that particular item? Isn't (insert cooler, more unique item here) a better choice?" I promise I will go over that when I cover item selection. Until then, let's continue.

In all honesty, Kog'Maw doesn't need anything more than these. While it is true that Kog is extremely
squishy, it is also true that he allows you to easily initiate an engagement while being far away from the damage. Since Kog'Maw is a very serious damage-dealing carry, he will get focused immediately in team fights. If you're playing Kog and get focused by five champions, it doesn't matter how much Defense, Magic Resist, or Health you have supplemented through your Runes and Masteries; you will very quickly find yourself with all of 6 seconds to choose who you want to explode on. Staying out of the center of the battle will allow the slobbering vomit monster to still deal very large amounts of damage while allowing for a quick retreat and making it difficult for the enemy team to focus.

Let me restate and emphasize that: If you are playing Kog'Maw, you should never be in a position
to be focused!

And that, my friends, is all there is to Runes and Masteries.

Guide Top

Kog Needs His Bling

As all of you readers might already be suspecting, this is going to be some sort of hybrid Kog build. That is true, in the most objective meaning of the word. I certainly won't be focusing only on Magic Damage or Attack Damage, for this build, but a lot of emphasis is put on [b[AP[/b]. Most of this build is about Attack Speed, obviously. With that in mind as you continue to read, let's consider why the item selection is as it is.

sorcerer's boots Sorcerer's Boots help with the early game, allowing each of Kog'Maw's abilities to do just a little bit more damage.
Nashor's Tooth increases the much needed Attack Speed by a good amount while still providing Kog with Mana Regeneration and cooldown reduction (although this is only in effect for the first Nashor's Tooth, as it is a Unique Passive).

Guide Top

The Culmination and Climax