Breath 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.
Steps
Declare 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.
Results
Infinite combat damage.
Infinite combat phases.
Infinite death triggers.
Infinite creature ETB.
Infinite creature LTB.
Infinite mana creatures you control can produce.
Infinite creature sacrifice triggers.
Infinite untap of creatures you control.
Metadata
Bracket tag
SpicyBracket 3-4+
Probably 3 or 4, but hard to classify
1
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5
1 · Exhibition5 · cEDH
Bracket tags are estimated from the cards and results of each combo, as a guideline rather than a strict classification.