Thematic passive ability reworks.
Nothing to do with game balance.
Give 
Kog'maw's passive.
http://plugcitarios.com/wp-content/uploads/2013/09/d9.jpg
Give Teemo's Passive to 
.
https://68.media.tumblr.com/061c701859eab2b5f9c845b3b0dfa913/tumblr_o141ffMWYq1tlljfxo1_500.gif jungler waits under tower for tower dive... ult.
Give 
a passive where he eats stuff
http://img06.deviantart.net/56cb/i/2013/107/5/f/kog_maw_by_lekikwi-d620j42.jpg
This would probably end as a total rework of Kog, but it just makes so much sense. the Maw of the Void should EAT PEOPLE!
The passive itself would probably work like Thresh's passive, but drop packets that heal/replenish mana. Replenishing mana would likely be better--especially if his W got a per-attack mana cost (barfing up that much stuff has to come from somewhere. his mana could just be food!!!!!!)
And then after teamfights, he would just run around eating corpses.
[slayer-pantheon-thumbs]
