Contraption,Brilliant Creation

Contraption, Brilliant Creation enters the battlefield with{x} test counters.
At the beginning of your upkeep put a test counter on Contraption, Brilliant Creation.
{t}{x} : Remove {x} test counters from Contraption, Brilliant Creation, put {x} +1+1 counters on up to {x} creatures.
If there are 12 test counters on Contraption, Brilliant Creation, you win the game.
Yes!! -Wyeth, Master Inventor