Brago, King Eternal + Combat Celebrant + Urabrask the Hidden Combo

All permanents on the battlefield.

An opponent cannot block Brago and Combat Celebrant.

Declare Brago and Combat Celebrant as attackers, choosing to exert Combat Celebrant as it attacks.

Combat Celebrant triggers, untapping all other creatures you control and to get an additional combat phase after this one.

Deal combat damage to an opponent using Brago.

Brago triggers, blinking Combat Celebrant.

Repeat each combat phase.

Infinite blinking

Infinite combat damage

Infinite combat phases

Infinite creature ETB

Infinite creature LTB

Infinite mana creatures you control can produce

Infinite untap of creatures you control