Squall, SeeD Mercenary
Combat Celebrant
Yahenni, Undying Partisan

   Prerequisites

What do I need to start this combo?
All permanents on the battlefield.
An opponent cannot block creatures you control.

   Steps

How does this combo work?
1
Declare Squall and Combat Celebrant as attackers, choosing to exert Combat Celebrant as it attacks.
2
Combat Celebrant triggers, untapping all other creatures you control and causing you to get an additional combat phase after this one.
3
Holding priority, activate Yahenni by sacrificing Combat Celebrant.
4
Deal combat damage to an opponent using Squall, triggering Squall's second ability, returning Combat Celebrant from your graveyard to the battlefield.
5
Repeat each combat phase.

   Results

What do I get from this combo?
Infinite LTB
Infinite ETB
Infinite sacrifice triggers
Infinite death triggers
Infinite combat phases
Infinite untap of creatures you control
Infinite mana creatures you control can produce
Infinite combat damage
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