Felidar Sovereign

Vigilance (Attacking doesn't cause this creature to tap.) Lifelink (Damage dealt by this creature also causes you to gain that much life.) At the beginning of your upkeep, if you have 40 or more life, you win the game.

Kneel before her Impurrial Meowjesty, Pawlina von Whiskerface III. It makes it much easier to give her pets.