Breath of Fury + Fires of Yavimaya + Threefold Thunderhulk
Breath of Fury
Fires of Yavimaya
Threefold Thunderhulk
Infinite combat damageInfinite combat phasesInfinite death triggersInfinite creature ETBInfinite creature LTBInfinite mana creatures you control can produceInfinite creature sacrifice triggersInfinite untap of creatures you controlInfinite creature tokens with haste
How it works
Declare the creature with Breath of Fury attached and Threefold Thunderhulk as attackers.
Threefold Thunderhulk 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 ingenious loop turns a recursive combat chain into a relentless army, fueled entirely by the overlapping synergies of your board. You begin by attacking with a creature enchanted by Breath of Fury alongside Threefold Thunderhulk, whose attack trigger immediately floods the board with Gnome artifact creature tokens. When your Breath of Fury carrier connects for combat damage, the Aura sacrifices it, jumps onto one of those newly minted tokens, untaps your entire team, and grants you an additional combat phase. Meanwhile, Fires of Yavimaya provides the crucial haste that allows your freshly-minted tokens to immediately join the fray without waiting for summoning sickness, letting you repeat this cycle for infinite combat phases and damage.