Breath of Fury + Origin of the Hidden Ones + Roar of Resistance

Breath of Fury

Origin of the Hidden Ones

Roar of Resistance

How it works

1. At the beginning of your precombat main phase, Origin of the Hidden Ones triggers, putting a lore counter on it.
2. Origin of the Hidden Ones' third chapter ability triggers, causing you to create an Assassin token whenever an Assassin attacks this turn and sacrifice Origin of the Hidden Ones.
3. Declare the creature with Breath of Fury attached, and at least one Assassin if the creature with Breath of Fury attached isn't an Assassin, as attackers.
4. Origin of the Hidden Ones triggers, creating a 1/1 Assassin creature token that's tapped and attacking.
5. Deal combat damage using the creature that has Breath of Fury attached.
6. Breath of Fury triggers, causing you to sacrifice the creature it is attached to, then attach Breath of Fury to the Assassin token, then causing you to untap all creatures you control and to get an additional combat phase after this one.
7. Repeat from step 3 each combat phase.

This engine relies on recycling Breath of Fury onto a fresh attacker to string together infinite combat phases. Thanks to Roar of Resistance, your newly created tokens gain haste so they can immediately join the fight, while its second ability can optionally pump your team. The critical fuel comes from Origin of the Hidden Ones, which reaches its third chapter to churn out an extra attacking Assassin every time your creatures declare an attack. By letting the creature enchanted by Breath of Fury deal combat damage, you trigger the Aura's sacrifice-and-reattach loop—refreshing your board with the untap step and chaining directly into another combat phase.