Pyewacket, The Lorgest Boi

Trample
Before your first main phase, Pyewacket, The
Lorgest Boi, tramples you. You may pass turn.
If you take any further actions, take 3 psychic
damage counters. Pyewacket refuses to enter
the battlefield for the rest of the game.
{t}, {4}, Sacrifice every other card on your
battlefield: Receive 5 purr counters.