Caesar, Legion's Emperor + Breath of FuryInitial Card StateBreath of Fury on the battlefield. Notable PrerequisitesBreath of Fury attached to another creature you control that does not have summoning sickness.
An opponent cannot block creatures you control.
You control at least one additional creature excluding the creature that has Breath of Fury attached.
 StepsDeclare the creature with Breath of Fury attached as an attacker.
Caesar triggers, causing you to sacrifice another creature you control and create two 1/1 Soldier creature tokens with haste that are tapped and attacking.
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 Soldier token, then causing you to untap all creatures you control and to get an additional combat phase after this one.
Repeat each combat phase.
 ResultsInfinite combat damageInfinite combat phasesInfinite death triggersInfinite ETBInfinite LTBInfinite mana creatures you control can produceInfinite sacrifice triggersInfinite untap of creatures you control