Leshwi, Archrival

First strike

Whenever Leshwi, Archrival 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.

based on Altaïr Ibn-La'Ahad