Atlantean Marksman (SDRE-EN003) [Structure Deck: Realm of the Sea Emperor]

When this card inflicts Battle Damage to your opponent: You can Special Summon 1 Level 4 or lower Sea Serpent-Type "Atlantean" monster, except "Atlantean Marksman", from your Deck. When this card is sent to the Graveyard for the activation of a WATER monster's effect: Target 1 Set card your opponent controls; destroy that target.