Crystalline Nautilus | Enchantment Creature | Nautilus | Bestow {3}{U}{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.)
When Crystalline Nautilus becomes the target of a spell or ability, sacrifice it.
Enchanted creature gets +4/+4 and has "When this creature becomes the target of a spell or ability, sacrifice it." | Brad Rigney
Dakra Mystic | Creature | Merfolk Wizard | {U}, {T}: Each player reveals the top card of their library. You may put the revealed cards into their owners' graveyards. If you don't, each player draws a card. | Wesley Burt
Hour of Need | Instant | | Strive — This spell costs {1}{U} more to cast for each target beyond the first.
Exile any number of target creatures. For each creature exiled this way, its controller creates a 4/4 blue Sphinx creature token with flying. | Jesper Ejsing
Interpret the Signs | Sorcery | | Scry 3, then reveal the top card of your library. Draw cards equal to that card's mana value. (To scry 3, look at the top three cards of your library, then put any number of them on the bottom of your library and the rest on top in any order.) | Cynthia Sheppard
Kiora's Dismissal | Instant | | Strive — This spell costs {U} more to cast for each target beyond the first.
Return any number of target enchantments to their owners' hands. | Mathias Kollros
Pull from the Deep | Sorcery | | Return up to one target instant card and up to one target sorcery card from your graveyard to your hand. Exile Pull from the Deep. | Ryan Yee
Riptide Chimera | Enchantment Creature | Chimera | Flying
At the beginning of your upkeep, return an enchantment you control to its owner's hand. | Ryan Barger
Thassa's Ire | Enchantment | | {3}{U}: You may tap or untap target creature. | Chris Rahn
Triton Cavalry | Creature | Merfolk Soldier | Heroic — Whenever you cast a spell that targets Triton Cavalry, you may return target enchantment to its owner's hand. | Kev Walker
Whitewater Naiads | Enchantment Creature | Nymph | Constellation — Whenever Whitewater Naiads or another enchantment enters the battlefield under your control, target creature can't be blocked this turn. | William Wu
Disciple of Deceit | Creature | Human Rogue | Inspired — Whenever Disciple of Deceit becomes untapped, you may discard a nonland card. If you do, search your library for a card with the same mana value as that card, reveal it, put it into your hand, then shuffle. | Daarken
Stormchaser Chimera | Creature | Chimera | Flying
{2}{U}{R}: Scry 1, then reveal the top card of your library. Stormchaser Chimera gets +X/+0 until end of turn, where X is that card's mana value. (To scry 1, look at the top card of your library, then you may put that card on the bottom of your library.) | Greg Staples
Fleetfeather Cockatrice | Creature | Cockatrice | Flash (You may cast this spell any time you could cast an instant.)
Flying, deathtouch
{5}{G}{U}: Monstrosity 3. (If this creature isn't monstrous, put three +1/+1 counters on it and it becomes monstrous.) | Matt Stewart