Twenty-Toed Toad is a rare Creature — Frog Wizard card from The List (PLST), collector number BLC-16. Current market price: $6.93, TCGplayer market prices via Scryfall.
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.