Morton Koopa Jr.

Trample
Morton Koopa Jr. doesn't untap during your
untap step if it attacked during your last turn.
The Seven Koopalings - At the beginning of your
upkeep, if you control seven Koopaling creatures
with different names, you win the game.
"Bwahahaha! I'm gonna stomp 'em silly."
- Morton Koopa Jr.