Altaïr Ibn-La'Ahad

First strike

Whenever Altaïr Ibn-La'Ahad 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.