Brad, Whimsy's Champion

At the beginning of your upkeep, if you control
twenty permanents with different artists, you
may have target player lose the game.
Each time a permanent enters the battlefield
under your control, if someone other than you compliments that card, you get an art counter.
Creatures you control get +X/+X where X is the number of art counters you control.
"A mimic disguised as a treasure chest?
How original..."