Now that Kassadin has that indicator in the ability icon for the mana cost of his ult, why not add the same thing to Kog'Maw's ult? It works in roughly the same way, and though it's maybe a bit less important for him than Kass's ult's mana cost is for Kass, it's still important information that could stand to be more visible.
Kog Maw is Awesome
I would also like to point out that Kog'Maw feels weaker since the recent changes. Before, with flat resist reductions on his Q, he could trade well with squishies who built no armor/MR. Now, the percentile reduction is not as good and it's resulting in worse trades. I like removing the mana cost on his W, but its CD is too high. I think the CD at higher levels should be more like the CD on Kayle's E.
Kog'Maw has no mobility, no escapes (slows don't count when most people can dash in this meta). He should do more damage than average to compensate.
