Raph & Mikey, Troublemakers + Breath of Fury + Cyclops of Eternal Fury
Raph & Mikey, Troublemakers
Breath of Fury
Cyclops of Eternal Fury
Near-infinite creature ETBNear-infinite creature LTBNear-infinite combat damageNear-infinite combat phasesNear-infinite death triggersNear-infinite mana creatures you control can produceNear-infinite creature sacrifice triggersNear-infinite untap of creatures you control
How it works
Declare Raph & Mikey and the creature with Breath of Fury attached as attackers.
Raph & Mikey triggers, revealing a creature card from your library and putting it onto the battlefield 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 the creature put onto the battlefield in step 2, and then causing you to untap all creatures you control and to get an additional combat phase after this one.
Repeat each combat phase until you have no creatures left in your library.