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
At the beginning of your combat phase, Council of Reeds triggers, creating a creature token.
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.
Repeat each combat phase.
This explosive loop relies on Council of Reeds to constantly multiply your creatures by ignoring the legend rule and triggering token copies at the start of combat. Lavaleaper ensures your newly minted tokens can immediately join the fray by granting haste, while also generating a surplus of flexible mana whenever basic lands are tapped. Finally, Breath of Fury harnesses this advancing army by sacrificing a damage-dealing attacker to bounce itself onto your newest Council of Reeds copy, untapping your board and granting an endless chain of additional combat phases.