Lucyfur, Soiler of Blankets

If you control a Blanket Lucyfur becomes a 5/5 with Trample and Vigilance.
Every time Lucyfur attacks add a poop and pee counter to it.
At the beginning of your upkeep you may pay {b/r} to take Lucyfur on a walk. If you do remove a poop and pee token from Lucyfur.
At your end step if Lucyfur has 4 poop and pee counters on it you lose the game.