Altaïr Ibn-La'Ahad (ACR 268)

Legendary Creature — Human Assassin • Mana cost: {R}{W}{B} • Assassin's Creed • Mythic

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.

Illustrated by Alex Negrea.