Infinite combat damageInfinite combat phasesInfinite death triggersInfinite creature ETBInfinite creature LTBInfinite mana creatures you control can produceInfinite creature sacrifice triggersInfinite untap of creatures you control
How it works
Kill the nontoken creature with haste that does not have Breath of Fury attached.
Deal combat damage to an opponent using Moira and the creature that has Breath of Fury attached, triggering Moira and Breath of Fury.
Resolve the Moira trigger, returning the nontoken creature with haste from your graveyard to the battlefield.
Resolve the Breath of Fury trigger, causing you to sacrifice the creature it is attached to, then attach Breath of Fury to the other nontoken creature with haste, then causing you to untap all creatures you control and to get an additional combat phase after this one.
Repeat from step 2 each combat phase.
This loop transforms your combat step into an endless sequence of vengeance fueled by the graveyard. By enchanting one attacker with Breath of Fury, you set up a dynamic where dealing combat damage to a player forces that creature's sacrifice while carrying the Aura forward to a fresh target, simultaneously untapping your board and granting an additional combat phase. Meanwhile, Moira, Urborg Haunt delivers combat damage of her own to trigger her recursive ability, pulling the creature you just lost straight out of the graveyard and back onto the battlefield ready to swing again. Together, they create a perpetual motion machine of repeating attacks, entering-the-battlefield effects, and sacrifice triggers that leaves opponents with no safe window to breathe.