Crypsis | Instant | | Target creature you control gains protection from creatures your opponents control until end of turn. Untap it. | Daarken
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
Flitterstep Eidolon | Enchantment Creature | Spirit | Bestow {5}{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.)
Flitterstep Eidolon can't be blocked.
Enchanted creature gets +1/+1 and can't be blocked. | Chase Stone
Meletis Astronomer | Creature | Human Wizard | Heroic — Whenever you cast a spell that targets Meletis Astronomer, look at the top three cards of your library. You may reveal an enchantment card from among them and put it into your hand. Put the rest on the bottom of your library in any order. | Dan Scott
Mindreaver | Creature | Human Wizard | Heroic — Whenever you cast a spell that targets Mindreaver, exile the top three cards of target player's library.
{U}{U}, Sacrifice Mindreaver: Counter target spell with the same name as a card exiled with Mindreaver. | Wesley Burt
Nullify | Instant | | Counter target creature or Aura spell. | Adam Paquette
Stratus Walk | Enchantment | Aura | Enchant creature
When Stratus Walk enters the battlefield, draw a card.
Enchanted creature has flying. (It can't be blocked except by creatures with flying or reach.)
Enchanted creature can block only creatures with flying. | Aaron Miller
Thassa's Rebuff | Instant | | Counter target spell unless its controller pays {X}, where X is your devotion to blue. (Each {U} in the mana costs of permanents you control counts toward your devotion to blue.) | Lucas Graciano
Kiora's Follower | Creature | Merfolk | {T}: Untap another target permanent. | Eric Deschamps