Nightmare Penguin is a Common Effect Monster card from Yu-Gi-Oh! (Realm of the Sea Emperor Structure Deck, SDRE). Current market price: $0.17.
Common
Realm of the Sea Emperor Structure Deck (SDRE)
Card Text
All face-up WATER monsters you control gain 200 ATK. When this card is flipped face-up: Target 1 card your opponent controls; return that target to the hand.
