Primo, the Unbounded + Breath of Fury + Urabrask the Hidden
Primo, the Unbounded
Breath of Fury
Urabrask the Hidden
Infinite creature ETBInfinite creature LTBInfinite combat damageInfinite combat phasesInfinite death triggersInfinite mana creatures you control can produceInfinite creature sacrifice triggersInfinite untap of creatures you control
How it works
Deal combat damage to an opponent using the creature that has Breath of Fury attached, triggering Breath of Fury and Primo.
Resolve the Primo trigger, creating a 0/0 Fractal creature token that enters with a number of +1/+1 counters on it equal to the damage dealt.
Resolve the Breath of Fury trigger, causing you to sacrifice the creature it is attached to and attach it to the Fractal 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 loop lets you chain infinite combat phases by recycling a single Aura into an ever-growing threat. You start by attacking with a creature enchanted by Breath of Fury, which triggers its sacrifice-and-reattach ability upon dealing combat damage to a player. At the same time, Primo, the Unbounded watches for creatures with base power 0 dealing combat damage, creating a fresh Fractal token that enters with +1/+1 counters equal to the damage dealt—perfect for catching the moving Breath of Fury. Meanwhile, Urabrask the Hidden ensures your newly spawned tokens and untapping creatures can immediately join the fray with haste, fueling an unstoppable chain of extra combats.