Declare Aurelia and Savior of Ollenbock as attackers, triggering Aurelia and Savior of Ollenbock's training ability.
Resolve the Aurelia trigger, untapping all creatures you control and causing you to get an additional combat phase after this one.
Holding priority, activate Ashnod's Altar by sacrificing Aurelia, adding {C}{C}.
If Aurelia is your commander, choose not to return it to the command zone.
When Aurelia dies, Nim Deathmantle triggers, choose not to pay for the trigger.
Resolve the Savior of Ollenbock trigger from step 1, putting a +1/+1 counter on it.
Savior of Ollenbock's second ability triggers, exiling Aurelia from your graveyard.
Activate Ashnod's Altar by sacrificing Savior of Ollenbock, adding {C}{C}.
When Savior of Ollenbock dies, its third ability and Nim Deathmantle trigger.
Resolve the Savior of Ollenbock trigger, returning Aurelia from exile to the battlefield.
Resolve the Nim Deathmantle trigger, causing you to pay {4} to return Savior of Ollenbock from your graveyard to the battlefield, and attach Nim Deathmantle to it.
Repeat each combat phase.

Infinite LTB

Infinite ETB

Infinite sacrifice triggers

Infinite death triggers

Infinite combat phases

Aurelia, the Warleader

Rising of the Day

Nim Deathmantle

Ashnod's Altar

Savior of Ollenbock

Declare the Combat Celebrant and Savior of Ollenbock as an attacker, choosing to exert Combat Celebrant as it attacks.
Combat Celebrant and Savior of Ollenbock triggers.
Resolve the Combat Celebrant triggers, untapping all other creatures you control and causing you to get an additional combat phase after this one.
Resolve the Savior of Ollenbock triggers, holding priority, activate Ashnod's Altar by sacrificing Combat Celebrant, adding {C}{C}.
Resolve the Savior of Ollenbock triggers, putting a +1/+! counter on itself and exiling Combat Celebrant from your graveyard.
Activate Ashnod's Altar by sacrificing Savior of Ollenbock, adding {C}{C}.
Savior of Ollenbock dies, triggering Nim Deathmantle and Savior of Ollenbock.
Resolve the Nim Deathmantle trigger, causing you to pay {4} to return Savior of Ollenbock from your graveyard to the battlefield, and attach Nim Deathmantle to it.
Resolve the Savior of Ollenbock trigger, putting Combat Celebrant onto the battlefield.
Repeat.

Combat Celebrant

Anger

Combos with "Savior of Ollenbock"