Atlantean Dragoons (SDRE-EN002) [Structure Deck: Realm of the Sea Emperor]

All Level 3 or lower Sea Serpent-Type monsters you control can attack your opponent directly. When this card is sent to the Graveyard for the activation of a WATER monster's effect: Add 1 Sea Serpent-Type monster from your Deck to your hand, except "Atlantean Dragoons".