Combat Celebrant | Stolen Identity | Urabrask the Hidden

Cards

Stolen Identity in exile (encoded on any creature you control except
Combat Celebrant).
Combat Celebrant and
Urabrask the Hidden on the battlefield.
An opponent cannot block the creature with
Stolen Identity encoded and
Combat Celebrant.

Declare
Combat Celebrant and the creature with
Stolen Identity encoded 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 the creature that has
Stolen Identity encoded.
Stolen Identity triggers, casting a copy of itself without paying its mana cost.
Resolve
Stolen Identity, creating a token copy of
Combat Celebrant.
Repeat each combat phase using the
Combat Celebrant token instead.