Breath of Fury + Helm of the Host

Breath of Fury

Helm of the Host

How it works

1. At the beginning of your combat phase, Helm of the Host triggers, creating a nonlegendary token copy of the creature it is attached to with haste.
2. Deal combat damage to an opponent using the creature that has Breath of Fury attached.
3. Breath of Fury triggers, causing you to sacrifice the creature it is attached to, then attach Breath of Fury to the token created in step 1, then causing you to untap all creatures you control and to get an additional combat phase after this one.
4. Repeat each combat phase.

This clever loop turns your combat step into an endless sequence of extra phases by exploiting Breath of Fury's recursive trigger. When the enchanted creature deals combat damage to an opponent, you sacrifice it to move the Aura onto fresh fodder, which is conveniently provided at the beginning of every combat step by Helm of the Host generating a hasty, nonlegendary token copy of your equipped threat. Because Breath of Fury untaps all your creatures along the way, you can repeat this process indefinitely across the extra combat phases it grants, producing endless damage, creature deaths, and enters-the-battlefield triggers.