Altaïr Ibn-La'Ahad
Port Razer
Leyline of Transformation
1

   Prerequisites

What do I need to start this combo?
Port Razer in your graveyard.
Altaïr Ibn-La'Ahad and Leyline of Transformation on the battlefield.
"Assassin" chosen with Leyline of Transformation.
An opponent cannot block creatures you control. You have a way to give Altaïr Ibn-La'Ahad vigilance.

   Steps

How does this combo work?
1
Give Altaïr Ibn-La'Ahad vigilance by any method.
2
Declare Altaïr Ibn-La'Ahad as an attacker.
3
Altaïr Ibn-La'Ahad triggers, exiling Port Razer from your graveyard with a memory counter on it as it is an Assassin due to Leyline of Transformation, and then creating a tapped and attacking token copy of each creature you own in exile with a memory counter on it.
4
Deal combat damage to an opponent using the Port Razer token.
5
The Port Razer token triggers, causing you to untap all creatures you control and to get an additional combat phase after this one.
6
At the end of your combat phase, Altaïr Ibn-La'Ahad triggers, exiling the Port Razer token.
7
Move to your next combat phase, and declare Altaïr Ibn-La'Ahad as an attacker.
8
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.
9
Repeat from step 4.

   Results

What do I get from this combo?
Infinite LTB
Infinite ETB
Infinite combat phases
Infinite untap of creatures you control
Infinite mana creatures you control can produce
Infinite combat damage
Top Commanders
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Lands
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Underground River
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Terramorphic Expanse
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