Flash
Flying
When this creature enters, look at the top card of target player's library.

When this creature enters, draw a card.
Descend 4 — This creature has flying as long as there are four or more permanent cards in your graveyard.

Whenever a Sliver creature you control becomes the target of a spell or ability an opponent controls, counter that spell or ability unless its controller pays .

Whenever you cast a historic spell, target player mills two cards. (Artifacts, legendaries, and Sagas are historic.)

Flying
When this creature enters, for each opponent, you may cast up to one target instant or sorcery card from that player's graveyard without paying its mana cost. If a spell cast this way would be put into a graveyard, exile it instead.

Devoid
Flash
Flying
: Target opponent exiles the top card of their library. If it's a land card, you may return this creature to its owner's hand.

Bargain
When this creature enters, if it was bargained, create a Cursed Role token attached to target creature an opponent controls. (If you control another Role on it, put that one into the graveyard. Enchanted creature is 1/1.)

When this creature enters, surveil 2.

, , Discard a card: Counter target spell or ability that targets a creature.

Instant and sorcery spells you cast cost less to cast.
Whenever you cast an instant or sorcery spell with mana value 5 or greater from your hand, this creature becomes prepared.

Flying
Ward

Defender
Megamorph

, Exile an instant or sorcery card from your graveyard: Choose one —
• Counter target noncreature spell unless its controller pays .
• This creature gets +1/+1 until end of turn.
• Tap target creature.
• Untap target creature.

When this creature enters, you may return target artifact to its owner's hand.

When this creature enters, venture into the dungeon. (Enter the first room or advance to the next room.)
Displacement — : Return this creature to its owner's hand.

Avoidance — Whenever you cast a noncreature spell, exile up to one target nonland permanent you control, then return that card to the battlefield under its owner's control.

: Counter target spell unless its controller pays .
Morph

: Counter target spell unless its controller pays .

Flash
Convoke
When this creature enters, return up to one other target nonland permanent to its owner's hand.

Exploit
When this creature exploits a creature, target creature's owner puts it on their choice of the top or bottom of their library.

Flying
Whenever this creature attacks, mill four cards. You may cast an instant or sorcery spell from your graveyard with mana value 4 or less without paying its mana cost. If that spell would be put into your graveyard, exile it instead.

This creature enters prepared.
Whenever you scry or surveil, this creature gets +1/+1 until end of turn.

Whenever this creature deals combat damage to a player, you and that player each draw that many cards.

Flash
When this creature enters, choose one —
• Tap target creature.
• Untap target creature.
• Draw a card, then discard a card.

Flying
Plot

Flying
: Exchange control of two target nonlegendary creatures. You can't activate this ability during combat.

Flying
Whenever you cast an instant or sorcery spell, choose one —
• This creature gets +1/+1 until end of turn.
• Exile this creature. Return it to the battlefield under its owner's control at the beginning of the next end step.
• Scry 1.

Flying
This creature enters with three wish counters on it.
, Remove a wish counter from this creature: Reveal the top card of your library. You may play that card without paying its mana cost. If you don't, exile it.