Chorus of the Tides | Creature | Siren | Flying
Heroic — Whenever you cast a spell that targets Chorus of the Tides, scry 1. (To scry 1, look at the top card of your library, then you may put that card on the bottom of your library.) | Steve Prescott
Deepwater Hypnotist | Creature | Merfolk Wizard | Inspired — Whenever Deepwater Hypnotist becomes untapped, target creature an opponent controls gets -3/-0 until end of turn. | Christopher Moeller
Floodtide Serpent | Creature | Serpent | Floodtide Serpent can't attack unless you return an enchantment you control to its owner's hand. (This cost is paid as attackers are declared.) | Steven Belledin
Nyxborn Triton | Enchantment Creature | Merfolk | Bestow {4}{U} (If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached to a creature.)
Enchanted creature gets +2/+3. | Clint Cearley
Sphinx's Disciple | Creature | Human Wizard | Flying
Inspired — Whenever Sphinx's Disciple becomes untapped, draw a card. | Ryan Alexander Lee