Blood Tsunami

Whenever a sea creature enters the battlefield under your control, target opponent loses 1 life and you draw a card.
(A sea creature is a Cephalid, Crab, Fish, Jellyfish, Kraken, Leviathan, Merfolk, Nautilus, Octopus, Oyster, Serpent, Shark,
Squid, Starfish, Turtle or Whale.)