Breath of Fury + Samut, Tyrant Smasher + Hanweir Garrison
Breath of Fury
Samut, Tyrant Smasher
Hanweir Garrison
Infinite creature ETBInfinite creature LTBInfinite combat damageInfinite combat phasesInfinite creature tokens with hasteInfinite 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 Hanweir Garrison as attackers.
Hanweir Garrison triggers, creating two creature tokens.
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 a creature token, then causing you to untap all creatures you control and to get an additional combat phase after this one.