[REQUIREMENT] If your opponent controls a monster, you can activate this by sending the top card of your Deck to the GY.
[EFFECT] Choose 1 face-up Sea Serpent monster you control and have it gain 400 ATK until the end of the turn. If there are no monsters in your GY, also, the chosen monster gains 600 ATK until the end of the turn.
Atom 1.0
