Benthic Giant | Creature | Giant | Hexproof (This creature can't be the target of spells or abilities your opponents control.) | Jaime Jones
Breaching Hippocamp | Creature | Horse Fish | Flash (You may cast this spell any time you could cast an instant.)
When Breaching Hippocamp enters the battlefield, untap another target creature you control. | Christopher Burdett
Coastline Chimera | Creature | Chimera | Flying
{1}{W}: Coastline Chimera can block an additional creature this turn. | Dan Scott
Crackling Triton | Creature | Merfolk Wizard | {2}{R}, Sacrifice Crackling Triton: It deals 2 damage to any target. | Greg Staples
Mnemonic Wall | Creature | Wall | Defender
When Mnemonic Wall enters the battlefield, you may return target instant or sorcery card from your graveyard to your hand. | Trevor Claxton
Nimbus Naiad | Enchantment Creature | Nymph | 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.)
Flying
Enchanted creature gets +2/+2 and has flying. | David Palumbo
Omenspeaker | Creature | Human Wizard | When Omenspeaker enters the battlefield, scry 2. (Look at the top two cards of your library, then put any number of them on the bottom of your library and the rest on top in any order.) | Dallas Williams
Prescient Chimera | Creature | Chimera | Flying
Whenever you cast an instant or sorcery spell, scry 1. (Look at the top card of your library. You may put that card on the bottom of your library.) | Daarken
Triton Shorethief | Creature | Merfolk Rogue | | Howard Lyon
Vaporkin | Creature | Elemental | Flying
Vaporkin can block only creatures with flying. | Seb McKinnon
Wavecrash Triton | Creature | Merfolk Wizard | Heroic — Whenever you cast a spell that targets Wavecrash Triton, tap target creature an opponent controls. That creature doesn't untap during its controller's next untap step. | Ryan Barger
Returned Phalanx | Creature | Zombie Soldier | Defender
{1}{U}: Returned Phalanx can attack this turn as though it didn't have defender. | Seb McKinnon
Agent of Horizons | Creature | Human Rogue | {2}{U}: Agent of Horizons can't be blocked this turn. | Clint Cearley