Breath of Fury + Adeline, Resplendent Cathar + Fires of Yavimaya
Breath of Fury
Adeline, Resplendent Cathar
Fires of Yavimaya
Infinite creature ETBInfinite combat damageInfinite combat phasesInfinite death triggersInfinite creature LTBInfinite mana creatures you control can produceInfinite creature sacrifice triggersInfinite untap of creatures you controlInfinite creature tokens with hasteInfinitely powerful creature
How it works
Declare the creature with Breath of Fury attached and Adeline as attackers.
Adeline 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 lets you take infinite combat phases by recycling a single Aura through an army of token attackers. Adeline, Resplendent Cathar is the engine that keeps the fodder flowing, continuously generating fresh Human tokens every time you declare attackers. Meanwhile, Fires of Yavimaya grants the crucial haste needed for those newly created tokens to immediately step up and carry Breath of Fury into the next battle. When the creature enchanted by Breath of Fury deals combat damage, you sacrifice it to move the Aura onto a fresh token, untapping your entire board to do it all over again in an endless sequence of additional combats.