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
Declare the creature with Breath of Fury attached and Squee as attackers.
Squee triggers, creating a creature token.
Deal combat damage using the creature that has Breath of Fury attached.
Breath of Fury triggers, causing you to sacrifice the creature it is attached to, then attach Breath of Fury to the creature token, then causing you to untap all creatures you control and to get an additional combat phase after this one.
Repeat each combat phase.
This elegant loop relies on Breath of Fury's ability to constantly recycle itself by leaping to a fresh body whenever the creature it enchants deals combat damage to a player. To keep this engine fueled perpetually, Squee, Dubious Monarch steps in by generating a brand-new 1/1 red Goblin creature token that's tapped and attacking every single time it swings, ensuring there is always a valid target waiting to receive the Aura. Meanwhile, Fervor grants all your creatures haste so that newly summoned tokens and untransferred threats can immediately participate in the continuous assault. By sacrificing the old carrier, untapping your board, and chaining endless extra combat phases together, you turn this relentless goblin-and-aura pairing into an unstoppable cycle of infinite attacks.