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.
|Pack||Cybernetic Rebellion [R]|
Lots of cards have an effect similar to Nightmare Penguin, below are just some examples. How Nightmare Penguin differentiates itself is by giving your WATER monsters an attack boost if he stays on the field.
|Actions||Returns from your opponent's field to your opponent's hand|
|Stat changes||Your monsters gain ATK|