Imaginary Pet

Stern Proctor

Creature — Human Wizard (1/2)

When Stern Proctor enters the battlefield, return target artifact or enchantment to its owner's hand.

Scoria Wurm

Creature — Wurm (7/7)

At the beginning of your upkeep, flip a coin. If you lose the flip, return Scoria Wurm to its owner's hand.

Acridian

Creature — Insect (2/4)

Echo (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)

Albino Troll

Creature — Troll (3/3)

Echo (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
: Regenerate Albino Troll.

Barrin, Master Wizard

Legendary Creature — Human Wizard (1/1)

, Sacrifice a permanent: Return target creature to its owner's hand.

Goblin War Buggy

Creature — Goblin (2/2)

Haste
Echo (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)

Wall of Junk

Artifact Creature — Wall (0/7)

Defender (This creature can't attack.)
When Wall of Junk blocks, return it to its owner's hand at end of combat. (Return it only if it's on the battlefield.)

Drifting Djinn

Creature — Djinn (5/5)

Flying
At the beginning of your upkeep, sacrifice Drifting Djinn unless you pay .
Cycling (, Discard this card: Draw a card.)

Gilded Drake

Creature — Drake (3/3)

Flying
When Gilded Drake enters the battlefield, exchange control of Gilded Drake and up to one target creature an opponent controls. If you don't or can't make an exchange, sacrifice Gilded Drake. This ability still resolves if its target becomes illegal.

Coral Merfolk

Creature — Merfolk (2/1)

Fog Bank

Creature — Wall (0/2)

Defender, flying
Prevent all combat damage that would be dealt to and dealt by Fog Bank.

Spire Owl

Creature — Bird (1/1)

Flying
When Spire Owl enters the battlefield, look at the top four cards of your library, then put them back in any order.

Launch

Enchantment — Aura

Enchant creature
Enchanted creature has flying.
When Launch is put into a graveyard from the battlefield, return Launch to its owner's hand.

Lilting Refrain

Enchantment

At the beginning of your upkeep, you may put a verse counter on Lilting Refrain.
Sacrifice Lilting Refrain: Counter target spell unless its controller pays , where X is the number of verse counters on Lilting Refrain.

Pendrell Flux

Enchantment — Aura

Enchant creature
Enchanted creature has "At the beginning of your upkeep, sacrifice this creature unless you pay its mana cost."

Veiled Apparition

Enchantment

When an opponent casts a spell, if Veiled Apparition is an enchantment, Veiled Apparition becomes a 3/3 Illusion creature with flying and "At the beginning of your upkeep, sacrifice Veiled Apparition unless you pay ."

Wizard Mentor

Creature — Human Wizard (2/2)

: Return Wizard Mentor and target creature you control to their owner's hand.

Citanul Centaurs

Creature — Centaur (6/3)

Shroud (This creature can't be the target of spells or abilities.)
Echo (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)

Cradle Guard

Creature — Treefolk (4/4)

Trample
Echo (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)

Crater Hellion

Creature — Hellion Beast (6/6)

Echo (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
When Crater Hellion enters the battlefield, it deals 4 damage to each other creature.