Altaïr Ibn-La'Ahad + Éomer, Marshal of Rohan + Kaya, Geist Hunter + Conspiracy Combo

Éomer in your graveyard.

All other permanents on the battlefield (Altaïr Ibn-La'Ahad without summoning sickness on the battlefield and Conspiracy with "Assassin" chosen on the battlefield).

Kaya has at least two loyalty counters on it. An opponent cannot block and kill Altaïr

Activate Kaya's second loyalty ability by removing two loyalty counters from it, causing you to double any tokens you create this turn.

Declare Altaïr as an attacker, triggering its ability, exiling Éomer from your graveyard with a memory counter on it and creating two tapped and attacking copies of Éomer.

Put all but one Éomer token into your graveyard due to the legend rule, causing you to get at least one Éomer trigger, 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 triggers, causing you to exile the Éomer token.

Repeat from step 2 each combat phase.

Infinite creature LTB

Infinite creature ETB

Infinite death triggers

Infinite combat phases

Infinite untap of creatures you control

Infinite mana creatures you control can produce