Squall, SeeD Mercenary + Combat Celebrant + Blasting Station Combo

All permanents on the battlefield.

An opponent cannot block creatures you control.

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

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

Holding priority, activate Blasting Station by tapping it and sacrificing Combat Celebrant.

Deal combat damage to an opponent using Squall, triggering Squall's second ability, returning Combat Celebrant from your graveyard to the battlefield.

When Combat Celebrant enters the battlefield, Blasting Station triggers, untapping Blasting Station.

Repeat each combat phase.

Infinite creature LTB

Infinite creature ETB

Infinite creature sacrifice triggers

Infinite death triggers

Infinite damage

Infinite combat phases

Infinite untap of creatures you control

Infinite mana creatures you control can produce

Infinite combat damage