Quarry Colossus

When this creature enters, put target creature into its owner's library just beneath the top X cards of that library, where X is the number of Plains you control.

Reprisal

Destroy target creature with power 4 or greater. It can't be regenerated.

Sightless Brawler

Bestow {4}{W} (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.)
This creature can't attack alone.
Enchanted creature gets +3/+2 and can't attack alone.

Skybind

Constellation — Whenever this enchantment or another enchantment you control enters, exile target nonenchantment permanent. Return that card to the battlefield under its owner's control at the beginning of the next end step.

Skyspear Cavalry

Flying
Double strike (This creature deals both first-strike and regular combat damage.)

Stonewise Fortifier

{4}{W}: Prevent all damage that would be dealt to this creature by target creature this turn.

Supply-Line Cranes

Flying
When this creature enters, put a +1/+1 counter on target creature.

Tethmos High Priest

Heroic — Whenever you cast a spell that targets this creature, return target creature card with mana value 2 or less from your graveyard to the battlefield.

Akroan Mastiff

Aerial Formation

Strive — This spell costs {2}{U} more to cast for each target beyond the first.
Any number of target creatures each get +1/+1 and gain flying until end of turn.

Battlefield Thaumaturge

Each instant and sorcery spell you cast costs {1} less to cast for each creature it targets.
Heroic — Whenever you cast a spell that targets this creature, this creature gains hexproof until end of turn.

Cloaked Siren

Flash (You may cast this spell any time you could cast an instant.)
Flying

Countermand

Counter target spell. Its controller mills four cards.

Crystalline 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.)
When this permanent 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."

Dakra Mystic

{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.

Daring Thief

Inspired — Whenever this creature becomes untapped, you may exchange control of target nonland permanent you control and target permanent an opponent controls that shares a card type with it.

Journey into Nyx