Star Trek

Creature — Shapeshifter

You may have this creature enter as a copy of any artifact or creature on the battlefield, except it isn't legendary. If you do, it enters with additional counters on it equal to the same number and kinds of counters the copied permanent has on it.

Dominion Saboteur

Card

Altaïr Ibn-La'Ahad

Assassin's Creed Art Series

Assassin's Creed

Legendary Creature — Human Assassin

Menace
Desmond Miles gets +1/+0 for each other Assassin you control and each Assassin card in your graveyard.
Whenever Desmond Miles deals combat damage to a player, surveil X, where X is the amount of damage it dealt to that player.

Desmond Miles

Copy

First strike
Whenever Altaïr attacks, exile up to one target Assassin creature card from your graveyard with a memory counter on it. Then for each creature card you own in exile with a memory counter on it, create a tapped and attacking token that's a copy of it. Exile those tokens at end of combat.

Treasure

Edward Kenway

Legendary Creature — Human Assassin Pirate

At the beginning of your end step, create a Treasure token for each tapped Assassin, Pirate, and/or Vehicle you control.
Whenever a Vehicle you control deals combat damage to a player, look at the top card of that player's library, then exile it face down. You may play that card for as long as it remains exiled.

Legendary Creature — Human Knight Rogue

{1}: Permanents your opponents control lose hexproof, indestructible, protection, shroud, and ward until end of turn.
Whenever a creature an opponent controls becomes the target of a spell or ability you control, put a bounty counter on that creature.
Whenever a creature with a bounty counter on it dies, put two +1/+1 counters on Shay Cormac.

Shay Cormac

Akal Pakal, First Among Equals

The Lost Caverns of Ixalan Art Series

Amalia Benavides Aguirre

The Lost Caverns of Ixalan

Legendary Creature — Human Advisor

At the beginning of each player's end step, if an artifact entered the battlefield under your control this turn, look at the top two cards of your library. Put one of them into your hand and the other into your graveyard.

Legendary Creature — Vampire Scout

Ward—Pay 3 life.
Whenever you gain life, Amalia Benavides Aguirre explores. Then destroy all other creatures if its power is exactly 20. (To have this creature explore, reveal the top card of your library. Put that card into your hand if it's a land. Otherwise, put a +1/+1 counter on this creature, then put the card back or put it into your graveyard.)

Dominaria United

Instant

This spell costs {U} less to cast if an opponent cast two or more spells this turn.
Counter target spell.

Ertai's Scorn

Domain — Target creature gets +1/+1 until end of turn for each basic land type among lands you control.

Gaea's Might

Innistrad: Double Feature

Zombie

Creature — Zombie

When this creature enters, create two 2/2 black Zombie creature tokens with decayed. When you do, exile up to two target cards from graveyards. (A creature with decayed can't block. When it attacks, sacrifice it at end of combat.)

Diregraf Horde

Secret Lair Drop

Changeling (This card is every creature type.)
Whenever an opponent casts a spell, you may put a +1/+1 counter on this creature.