Twenty-Toed Toad 
Creature — Frog Wizard
Your maximum hand size is twenty. Whenever you attack with two or more creatures, put a +1/+1 counter on this creature and draw a card. Whenever this creature attacks, you win the game if there are twenty or more counters on it or you have twenty or more cards in hand.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyLEGALvintageLEGALcommanderLEGAL