Lee Sin is ridiculously good in League of Cleavers. Here's a scenario for you:
He can get 4 stacks on you in half a second with double-Q->auto->double-E. If the fight goes poorly, he can just press W and run off, or use it on his Wukong friend who just jumped in and ulted, giving you 4 more stacks of Cleaver-tastic armor shred. And then he presses W again and has nasty life steal and spell vamp for E KUUUUU, which sends you flying into your carry, knocking them up into the air, so that he can press his Q which just came off of cooldown and fly into their face, after which he proceeds to shred what little armor they might have from runes and lord it over them with his base damages.
Oh and by the way there is a Kha'Zix (with a BC), Leona, and Ezreal (that AS buff... and a BT Gauntlet, and LW) on that team as well. Someone other than Wukong has red buff. Kha'Zix has blue buff.