
Aetherling | Creature | Shapeshifter | {U}: Exile Aetherling. Return it to the battlefield under its owner's control at the beginning of the next end step.
{U}: Aetherling can't be blocked this turn.
{1}: Aetherling gets +1/-1 until end of turn.
{1}: Aetherling gets -1/+1 until end of turn. | Tyler Jacobson

Artisan of Forms | Creature | Human Wizard | Heroic — Whenever you cast a spell that targets Artisan of Forms, you may have Artisan of Forms become a copy of target creature, except it has this ability. | Min Yum

Brineborn Cutthroat | Creature | Merfolk Pirate | Flash (You may cast this spell any time you could cast an instant.)
Whenever you cast a spell during an opponent's turn, put a +1/+1 counter on this creature. | Caio Monteiro

Chasm Skulker | Creature | Squid Horror | Whenever you draw a card, put a +1/+1 counter on Chasm Skulker.
When Chasm Skulker dies, create X 1/1 blue Squid creature tokens with islandwalk, where X is the number of +1/+1 counters on Chasm Skulker. (They can't be blocked as long as defending player controls an Island.) | Jack Wang

Cloudfin Raptor | Creature | Bird Mutant | Flying
Evolve (Whenever a creature you control enters, if that creature has greater power or toughness than this creature, put a +1/+1 counter on this creature.) | Maxime Minard

Fallaji Archaeologist | Creature | Human Scout | When Fallaji Archaeologist enters, mill three cards. You may put a noncreature, nonland card from among the cards milled this way into your hand. If you don't, put a +1/+1 counter on Fallaji Archaeologist. (To mill a card, put the top card of your library into your graveyard.) | Caroline Gariba

Illusory Angel | Creature | Angel Illusion | Cast this spell only if you've cast another spell this turn.
Flying | Allen Williams

Ingenious Skaab | Creature | Zombie Horror | Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
{U}: Ingenious Skaab gets +1/-1 until end of turn. | Jesper Ejsing

Jace, Vryn's Prodigy | Legendary Creature | Human Wizard | {T}: Draw a card, then discard a card. If there are five or more cards in your graveyard, exile Jace, Vryn's Prodigy, then return him to the battlefield transformed under his owner's control. | Jaime Jones

Jhessian Thief | Creature | Human Rogue | Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
Whenever Jhessian Thief deals combat damage to a player, draw a card. | Miles Johnston

Master of Waves | Creature | Merfolk Wizard | Protection from red
Elemental creatures you control get +1/+1.
When Master of Waves enters, create a number of 1/0 blue Elemental creature tokens equal to your devotion to blue. (Each {U} in the mana costs of permanents you control counts toward your devotion to blue.) | Karl Kopinski

Murmuring Mystic | Creature | Human Wizard | Whenever you cast an instant or sorcery spell, create a 1/1 blue Bird Illusion creature token with flying. | Mark Winters

Niblis of Frost | Creature | Spirit | Flying
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
Whenever you cast an instant or sorcery spell, tap target creature an opponent controls. That creature doesn't untap during its controller's next untap step. | Josu Hernaiz

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

Opal Lake Gatekeepers | Creature | Vedalken Soldier | When Opal Lake Gatekeepers enters, if you control two or more Gates, you may draw a card. | Arif Wijaya

Shipbreaker Kraken | Creature | Kraken | {6}{U}{U}: Monstrosity 4. (If this creature isn't monstrous, put four +1/+1 counters on it and it becomes monstrous.)
When Shipbreaker Kraken becomes monstrous, tap up to four target creatures. Those creatures don't untap during their controllers' untap steps for as long as you control Shipbreaker Kraken. | Jack Wang

Stormtide Leviathan | Creature | Leviathan | Islandwalk (This creature can't be blocked as long as defending player controls an Island.)
All lands are Islands in addition to their other types.
Creatures without flying or islandwalk can't attack. | Karl Kopinski

Tah-Crop Skirmisher | Creature | Snake Warrior | Embalm {3}{U} ({3}{U}, Exile this card from your graveyard: Create a token that's a copy of it, except it's a white Zombie Snake Warrior with no mana cost. Embalm only as a sorcery.) | Victor Adame Minguez

Tidebinder Mage | Creature | Merfolk Wizard | When Tidebinder Mage enters, tap target red or green creature an opponent controls. That creature doesn't untap during its controller's untap step for as long as you control Tidebinder Mage. | John Severin Brassell

Windrider Patrol | Creature | Merfolk Wizard | Flying
Whenever Windrider Patrol deals combat damage to a player, scry 2. (Look at the top two cards of your library, then put any number of them on the bottom and the rest on top in any order.) | Svetlin Velinov

Zephyr Winder | Creature | Elemental | Flying
Whenever Zephyr Winder deals combat damage to a player, untap up to one target creature. | Jana Schirmer

Archaeomancer | Creature | Human Wizard | When Archaeomancer enters, return target instant or sorcery card from your graveyard to your hand. | Zoltan Boros

Silumgar Sorcerer | Creature | Human Wizard | Flash (You may cast this spell any time you could cast an instant.)
Flying
Exploit (When this creature enters, you may sacrifice a creature.)
When Silumgar Sorcerer exploits a creature, counter target creature spell. | Jeff Simpson

Sphinx of Magosi | Creature | Sphinx | Flying
{2}{U}: Draw a card, then put a +1/+1 counter on Sphinx of Magosi. | James Ryman

Thassa, God of the Sea | Legendary Enchantment Creature | God | Indestructible
As long as your devotion to blue is less than five, Thassa isn't a creature. (Each {U} in the mana costs of permanents you control counts toward your devotion to blue.)
At the beginning of your upkeep, scry 1.
{1}{U}: Target creature you control can't be blocked this turn. | Jason Chan

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

Dragonlord Ojutai | Legendary Creature | Elder Dragon | Flying
Dragonlord Ojutai has hexproof as long as it's untapped.
Whenever Dragonlord Ojutai deals combat damage to a player, look at the top three cards of your library. Put one of them into your hand and the rest on the bottom of your library in any order. | Chase Stone

Lyev Skyknight | Creature | Human Knight | Flying
When Lyev Skyknight enters, detain target nonland permanent an opponent controls. (Until your next turn, that permanent can't attack or block and its activated abilities can't be activated.) | Johannes Voss

Medomai the Ageless | Legendary Creature | Sphinx | Flying
Whenever Medomai the Ageless deals combat damage to a player, take an extra turn after this one.
Medomai the Ageless can't attack during extra turns. | David Palumbo

Thunderclap Wyvern | Creature | Drake | Flash (You may cast this spell any time you could cast an instant.)
Flying
Other creatures you control with flying get +1/+1. | Jason Felix

Ephara, God of the Polis | Legendary Enchantment Creature | God | Indestructible
As long as your devotion to white and blue is less than seven, Ephara isn't a creature.
At the beginning of each upkeep, if you had another creature enter the battlefield under your control last turn, draw a card. | Eric Deschamps

Dinrova Horror | Creature | Horror | When Dinrova Horror enters, return target permanent to its owner's hand, then that player discards a card. | Johann Bodin

Dragonlord Silumgar | Legendary Creature | Elder Dragon | Flying, deathtouch
When Dragonlord Silumgar enters, gain control of target creature or planeswalker for as long as you control Dragonlord Silumgar. | Steven Belledin

Notion Thief | Creature | Human Rogue | Flash
If an opponent would draw a card except the first one they draw in each of their draw steps, instead that player skips that draw and you draw a card. | Clint Cearley

Possessed Skaab | Creature | Zombie | When Possessed Skaab enters, return target instant, sorcery, or creature card from your graveyard to your hand.
If Possessed Skaab would die, exile it instead. | John Stanko

Tomebound Lich | Creature | Zombie Wizard | Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)
Lifelink (Damage dealt by this creature also causes you to gain that much life.)
Whenever Tomebound Lich enters or deals combat damage to a player, draw a card, then discard a card. | Cristi Balanescu

Nightveil Specter | Creature | Specter | Flying
Whenever Nightveil Specter deals combat damage to a player, that player exiles the top card of their library.
You may play lands and cast spells from among cards exiled with Nightveil Specter. | Min Yum

Phenax, God of Deception | Legendary Enchantment Creature | God | Indestructible
As long as your devotion to blue and black is less than seven, Phenax isn't a creature.
Creatures you control have "{T}: Target player mills X cards, where X is this creature's toughness." | Ryan Barger

Nivix Cyclops | Creature | Cyclops | Defender
Whenever you cast an instant or sorcery spell, Nivix Cyclops gets +3/+0 until end of turn and can attack this turn as though it didn't have defender. | Wayne Reynolds

Stormchaser Mage | Creature | Human Wizard | Flying, haste
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.) | Clint Cearley

Frostburn Weird | Creature | Weird | {U/R}: Frostburn Weird gets +1/-1 until end of turn. | Mike Bierek

Keranos, God of Storms | Legendary Enchantment Creature | God | Indestructible
As long as your devotion to blue and red is less than seven, Keranos isn't a creature.
Reveal the first card you draw on each of your turns. Whenever you reveal a land card this way, draw a card. Whenever you reveal a nonland card this way, Keranos deals 3 damage to any target. | Daarken

Kiora's Follower | Creature | Merfolk | {T}: Untap another target permanent. | Eric Deschamps

Progenitor Mimic | Creature | Shapeshifter | You may have Progenitor Mimic enter as a copy of any creature on the battlefield, except it has "At the beginning of your upkeep, if this creature isn't a token, create a token that's a copy of this creature." | Daarken

Skyrider Elf | Creature | Elf Warrior Ally | Flying
Converge — Skyrider Elf enters with a +1/+1 counter on it for each color of mana spent to cast it. | Dan Murayama Scott

Bounding Krasis | Creature | Fish Lizard | Flash (You may cast this spell any time you could cast an instant.)
When Bounding Krasis enters, you may tap or untap target creature. | Jack Wang

Kruphix, God of Horizons | Legendary Enchantment Creature | God | Indestructible
As long as your devotion to green and blue is less than seven, Kruphix isn't a creature.
You have no maximum hand size.
If you would lose unspent mana, that mana becomes colorless instead. | Daarken

Chromanticore | Enchantment Creature | Manticore | Bestow {2}{W}{U}{B}{R}{G} (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, first strike, vigilance, trample, lifelink
Enchanted creature gets +4/+4 and has flying, first strike, vigilance, trample, and lifelink. | Min Yum