Aviary Mechanic

When this creature enters, you may return another permanent you control to its owner's hand.

Sejiri Refuge

This land enters tapped.
When this land enters, you gain 1 life.
{T}: Add {W} or {U}.

Archaeomancer

When this creature enters, return target instant or sorcery card from your graveyard to your hand.

Kor Skyfisher

Flying
When this creature enters, return a permanent you control to its owner's hand.

Journey to Nowhere

When this enchantment enters, exile target creature.
When this enchantment leaves the battlefield, return the exiled card to the battlefield under its owner's control.

Ghostly Flicker

Exile two target artifacts, creatures, and/or lands you control, then return those cards to the battlefield under your control.

Snap

Return target creature to its owner's hand. Untap up to two lands.

Reality Acid

Enchant permanent
Vanishing 3 (This Aura enters with three time counters on it. At the beginning of your upkeep, remove a time counter from it. When the last is removed, sacrifice it.)
When this Aura leaves the battlefield, enchanted permanent's controller sacrifices it.

Crystallization

Enchant creature
Enchanted creature can't attack or block.
When enchanted creature becomes the target of a spell or ability, exile that creature.

Drake Familiar

Flying
When this creature enters, sacrifice it unless you return an enchantment to its owner's hand.

Island

Curse of Chains

Enchant creature
At the beginning of each upkeep, tap enchanted creature.

Void Snare

Return target nonland permanent to its owner's hand.

Tranquil Cove

Mulldrifter

Flying
When this creature enters, draw two cards.
Evoke {2}{U} (You may cast this spell for its evoke cost. If you do, it's sacrificed when it enters.)

Stonehorn Dignitary

When this creature enters, target opponent skips their next combat phase.

Momentary Blink

Exile target creature you control, then return it to the battlefield under its owner's control.
Flashback {3}{U} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Cloudshift

Exile target creature you control, then return that card to the battlefield under your control.

Aven Fogbringer

Flying
When this creature enters, return target land to its owner's hand.

Faith's Fetters

Enchant permanent
When this Aura enters, you gain 4 life.
Enchanted permanent can't attack or block, and its activated abilities can't be activated unless they're mana abilities.

Sea Gate Oracle

When this creature enters, look at the top two cards of your library. Put one of them into your hand and the other on the bottom of your library.

Cloud of Faeries

Flying
When this creature enters, untap up to two lands.
Cycling {2} ({2}, Discard this card: Draw a card.)

Plains

Rhystic Study

Whenever an opponent casts a spell, you may draw a card unless that player pays {1}.

Dream Stalker

When this creature enters, return a permanent you control to its owner's hand.

Oblivion Ring

When this enchantment enters, exile another target nonland permanent.
When this enchantment leaves the battlefield, return the exiled card to the battlefield under its owner's control.