Primo, the Unbounded + Breath of Fury + Anger

Primo, the Unbounded

Breath of Fury

Anger

How it works

1. Deal combat damage to an opponent using the creature that has Breath of Fury attached, triggering Breath of Fury and Primo.
2. Resolve the Primo trigger, creating a 0/0 Fractal creature token that enters with a number of +1/+1 counters on it equal to the damage dealt.
3. Resolve the Breath of Fury trigger, causing you to sacrifice the creature it is attached to and attach it to the Fractal token, 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 relentless loop starts by enchanting a creature with Breath of Fury to deal combat damage, which triggers its sacrifice and reattachment ability alongside Primo, the Unbounded's token generation. Because Primo creates a Fractal token with base power 0 and distributes +1/+1 counters equal to the damage dealt, that new token is instantly primed to inherit Breath of Fury and repeat the whole cycle. Meanwhile, having Anger sitting safely in your graveyard ensures your newly-untapped tokens don't have to wait around, granting them haste as long as you control a Mountain so they can charge straight into the next additional combat phase.