Altaïr Ibn-La'Ahad | Port Razer | Ashes of the Fallen

Cards

Declare
Altaïr Ibn-La'Ahad as an attacker.
Altaïr Ibn-La'Ahad triggers, exiling
Port Razer from your graveyard with a memory counter on it as it is an Assassin due to
Ashes of the Fallen, and then creating a tapped and attacking token copy of each creature you own in exile with a memory counter on it.
Deal combat damage to an opponent using the
Port Razer token.
The
Port Razer token triggers, causing you to untap all creatures you control and to get an additional combat phase after this one.
At the end of your combat phase,
Altaïr Ibn-La'Ahad triggers, exiling the
Port Razer token.
Move to your next combat phase, and declare
Altaïr Ibn-La'Ahad as an attacker.
Altaïr Ibn-La'Ahad triggers, creating a tapped and attacking token copy of each creature you own in exile with a memory counter on it.
Repeat from step 3.

This combo has been estimated to be Exhibition (Bracket 1+).