Werewhat is a rare Creature — Werewolf card from Mystery Booster 2 (MB2), collector number 587. Current market price: $0.19, TCGplayer market prices via Scryfall.
Daybound As Werewhat enters the battlefield, you may exile a creature card from your graveyard or hand. If you do, that card becomes this creature's back face and that back face has nightbound. If you exiled a card from your hand this way, draw a card.