Ok. OBVIOUSLY you didn't read the previous comments... there is a whole argument about WHY I put them in there. Figure it out before down voting...

However, since a majority of you people are too lazy to actually read the guide, I'll just take it out.

Maybe I'll require comment to vote again.

Boots of swiftness is a fail and not fitting at all.

Oh yes of course!! I KNEW I was forgetting something..! I'll put that in presently.

As for ghost, it really doesn't matter that much what you want to use. Ghost works fine, I just seriously don't suggest REPLACING Flash with Ghost, which I explained in an earlier comment.

And yea, I haven't looked at the masteries too much, so I never really updated them, but I'll look them back over and probably put in the neutral buff duration because what you said is absolutely true.

Thanks for your compliments!

Hey really good guide! My Kog build is very similar, except I would include zhonyas hourglass in the items section. since Kog is so squishy, its active can really save you if you use it correctly, and it gives a but load of ap. I personally run Ghost and Flash, since kog has no escapes, and in the utility mastery tree I get neutral buff duration, because Kog with blue is an endless stream of ults, so the longer you have it the more damage you do with it! These are all very minor gripes, but overall really good stuff here.

Ok, first to Pranzatelli:

I've been waiting for a guy like you to tell me my magic pen calculation is wrong. Sounds bad, but I never really did figure that out all the way. I just went based of off what a friend said.

So then, you are right, and I will make some changes about the runes and such. Get whatever boots you want. And the whole idea of the Lich Bane is to make you faster, push towers better, take out tanks (while playing AP!) and give you a bit of MR. I also totally agree with the second Archangel's, it is not a bad idea, I just like my Lich Bane. Although, it can be a situational item. Get Archangel's for more damage, and Lich Bane for more MS/MR.

Thinking back some... I also play Lux quite a bit, and she was my main before Kog'Maw. I recall a few games where I sold my boots and got a Lich Bane instead... So I just had the idea of getting no boots on Kog, two Archangel's and a Lich Bane... what do you think?


Now for Rolrctermaniac:

Yea, I guess if you burn your mana really hard (which is easy to do) you can farm a quick 890 gold and buy one, to sell later. Up to you really.

Heck buy it for no other reason than having near 600 mana regen after chewing through your mana with blue buff. :D but seriously 890 gold is not a lot and you can just sell it later!

I have every intent of upvoting this guide. I have some ideas for changes, though, and I'd like to hear your response to those first.
Percentage penetration applies after flat penetration. You stack flat penetration, and then advocate building a Void Staff...for what? So you can penetrate 46% (40% and 10%) of the magic resistance left over after you've already penetrated through 39 of it? I'd replace the shoes with Boots of Swiftness or Ionian Boots of Lucidity, and use flat or scaling AP or flat or scaling CDR Quints and Glyphs. (I get really anal-retentive about defense penetration. Mathematically, it's a commonly overvalued stat to begin with.)
I'm liking the idea of a Lich Bane, though you can also build additional Archangel's. The 3% Mana->AP effect stacks, as does the 45 AP and 400 Mana. The 1000 Mana doesn't, but the new Archangel's going to work on the old Archangel's 1400 Mana, and add 400 Mana that they'll both work on. With this new source of straight-up AP, you can get to upwards of 800 AP, which is nice.

Mmmm Idk about that. While the mana regeneration is certainly powerful, and Kog'maw can burn mana very quickly, I wouldn't suggest it since it doesn't build into anything. It is much more worth while to build that Meki Pendant into your Tear of the Goddess, and the Null-Magic Mantle into Lichbane.

However, this is entirely your choice, and I'm not going to make you follow my build exactly. Use whatever you want! :)

I feel like Chalice of Harmony should get a mention

Oh ok, the surge thing makes more sense now thanks.

Yes, I do find my mana supply more than enough (in most cases) to completely push off entire teams. Otherwise, it means that It's during a very long push, or I manage to wipe the team.
Note that I don't necessarily have 725 less mana. I DO get an Archangel's, and that provides a lot, with the mana from Lich Bane to boot. And, to answer your question, I most definitely consider the damage to be worth the lack of mana. Although I personally hate Twitch (no offense!), I guess I sort of do act like a clean-up crew, especially since I'm always with incompetent players -_- But I'm also perfectly capable of pushing off entire teams alone.

Ok i see what you meant there, sorry for the confusion.

Let me explain how things go for me with the whole AD pwning me deal. When I'm alone, it probably means it's early game, or I'm just on the very edge of a level 16 ult range. In which case, I could see an AD coming for me long before they get there, taking out almost all their health on the way. They usually just turn back and die. But, say they come out of the jungle, then I throw a q,e,r and kill any squishier ones, or just keep ulting them for the tanky ads. The burst is almost always to much to handle, life steal or not. Now lets say that even with all this burst, I STILL die to the AD, then I'd have made the mistake of letting him get fed, or not feeding myself. If things are going so poorly that any AD carry can just come and kill me, then I messed up somewhere.

As for the mana, it really does come down to preference as you say. I personally don't run out of mana because I almost always land my ult. It certainly has less room for error, but that is my play style. When you say that mine is for more of a killing device... I couldn't agree more. My ult alone (no e or anything) contributes to about 80% of my kills. I use it all the time, often preferring it over just auto-attacking.

And I definitely do agree... stealing that whole minion wave from your ad carry with just one spell is hilarious...

Thank YOU for bringing this up. Away at my boarding school, I rarely have time to talk about LoL. Have fun endlessly bombing!

Surge is 10 to 78 ap depending on your level and gets bumped up by 10% if you take the mastery that icreases them. It goes without saying but it also gets boosted by any ap% increaces.... meaning rabadons and the masteries that boost ap by a % amount making it's usefulness more than it appears.

As for your quote of me (sorry for not proofreading it... but you got the point, that quote of me you made was one I didn't find too important(thus typos)) I meant is do you find your mana supply to be enough to rain hell down upon the opponenet nonestop if you have blue buff. Note I mean virtually nonestop... it seems like you never stop ulting... you might take a 5 second break once in awhile. I'd assume you have a tougher time with it for it's 725 less mana that you have... although your increaced deadliness makes up for it. I wanted to know if you found if that your (increased compared to my builds) deadliness is worth less mana. From what it sounds like, you act much like twitch, you're a cleanup crew that is really hard to run away from, especially sicne you have teleport.

Nice explanation on why teleport and flash.

As for my build being tagged ap ad op ∞mana kog, the only reason the ad is there is lich bane... yours si as ad as mine, although it has 40% more magic pen, I just find the magic pen not to be as important as the mana because i figure quanitty over auality... for your ult hit's around 1k magic damage because of the 250% to champions of what it says it does... to anything else. My build as you must have noticed is straight ap, but with lich bane and surge it ends up being around 1110 ad every 2 seconds and then autoattacks speed boosted by surge causing your w to hit for 9% + 6% of their health every autattack thus making you a greater ap tankbuster or ultimate hybrid nuke. Your lich bane does around 110 ad + 800 + some odd amount of ap I assume (assuming no teammates with will of the anchients).

As for the "Teammate buffer" I mean kog is squishy, an ad carry jumping on = that has a ton of lifesteal = your dead... or at least that's what I find until fully built... then it becomes a draw. Anyways teammates are to protect you via keeping enemies at bay, so if your teammates decide to retreat while your watching the enemy squirm... you may not notice your teamamtes pull out... and thus your vunerable... with a teammate buffer your unstoppable... and this is where with blue buff I can basically infinitely ult the enemy with them unable to do anything, for if they engage they stand still and make easy pickins'.

Finally I udnerstand the conservation of mana... sicne you bring that up I assume you have to pay heed to your mana, and I'd agree that it comes with practice...

It all comes down to preference, for the my extra mana allows for more error and I get to hit about the same amount in the long run... so mines more of a harass and survivability... yours is more of a killing device. But you got to agree with me on 1 thing... barfing down antire minion waves in 1 hit rocks... lol have fun and thanks for taking the time to respond.

REPLY TO A.R.M.

That was rough :) but it's totally ok. I really appreciate your help. I'll try to address everything you've said, but I may miss some things >.<

I'm actually particularly happy that you brought up the surge issue. I guess I never really gave it much attention, but it is definitely true that it gives a good amount of damage. I must also say that I already knew that exhaust would actually be a good pick, just not when I wrote that part of the guide. (I played for a day over winter break, and, using Riven, discovered what a life saver exhaust really is.) I'll be sure to update what I've said about them both pretty soon. (Although one thing about surge...is it 10-78% or just 10-78? because 78 isn't THAT much worth it..) Also another thing to notice is this is full AP, not AP AD infinite mana OP Kog'maw, as I believe you put it in your guide :P

I'm not sure I got this part of what you said, "...can you suppress the oppoents entire team if you have blue buff and a teammate buffer for if they charge, if not then this is for people extremely skill with skillshotting and able to conserve mana," but I think I did. I personally can accomplish that with blue for sure... although I don't know what you mean by "Teammate buffer" there. I feel that I am very good at skill shotting, and I can see how this guide would more or less require a good ability to do so. Conserving mana simply comes with practice.. one cannot learn it.

Now about the summoner spells..

Flash. Great summoner spell. Yes, I am generally in the back of things, and yea, almost always near a wall or tower to flash to/over. Now here's my view point on it:

I use flash mostly for catching up. think of it this way: You see your target that you want to kill. They don't know "that dammed kog" is coming, so they stay there, farming or whatever. so you ult them..and ult them again..and again..and again.. and as they are trying to run away, they are constantly getting slopped on by your ult, and getting slowed by rylai's. Now, if, in the off chance, they happen to dodge one of your ults, and dash forward somehow via ability or flash, then they should be just out of range. problem? no. YOU flash forward and ult again, slowing them more. they wont expect it, they just got out of range. this guarantees the kill. Ghost will help you catch up, sure, but not instantly. you have to run forward to get closer. Sometimes, the time it takes for this is too long, and they manage to run to a healer, or even way back in their base/behind towers that you cant chase them to without fear of dieing. Flash gets you right where you need to be instantly.

So I guess either way works, but I also guess that flash might require a little bit more reliability on your part to actually land the ult. It really just comes down to personal preference and ability.

And I agree with you, again, about exhaust... I'll fix that soon enough.

As for teleport, it just needs to be used at the proper moment. Obviously, you shouldn't get it when you have ghost; there's no point (although i did not mention this in the guide). Also, if you are at your base, and the kill is going on down bot, there's no way ghost will get you there in time. As for porting in, you would obviously only do it after the brunt of the fight is over, and it is a safe place to tp to (allies around). This lets you get the easy pick off on the low hp target backing behind the tower. Ghost cant get you from shop to bot river in seven seconds.

But overall, I really appreciate your constructive criticism, its always nice to have, and I wish you good luck!