Jinnie Fay, Jetmir's Second + Breath of Fury + Captain Lannery Storm
Jinnie Fay, Jetmir's Second
Breath of Fury
Captain Lannery Storm
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 Captain Lannery Storm as attackers.
Captain Lannery Storm's first ability triggers, creating a 2/2 Cat creature token with haste due to Jinnie Fay.
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 Cat 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 setup turns a relentless chain of extra combats into an unstoppable army by utilizing Jinnie Fay, Jetmir's Second as a token-replacement engine. Every time Captain Lannery Storm attacks, she generates a Treasure token, which Jinnie Fay immediately redirects into a hasty 2/2 Cat token to serve as the next vessel for Breath of Fury. Once the creature enchanted by Breath of Fury lands its combat damage, the Aura sacrifices it, untaps your entire team, and hops onto the fresh Cat token for another combat phase. Because Captain Lannery Storm fuels the continuation by providing the fodder for Jinnie Fay, you loop through endless combat steps, infinite sacrifices, and infinite combat damage.