Breath of Fury + Fires of Yavimaya + Slash, Reptile Rampager
Breath of Fury
Fires of Yavimaya
Slash, Reptile Rampager
Infinite creature ETBInfinite creature LTBInfinite combat damageInfinite combat phasesInfinite damageInfinite death triggersInfinite 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 Slash as attackers.
Slash's second ability triggers, creating a creature token.
When the creature token enters, Slash's first ability triggers, dealing 2 damage to each opponent.
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.