Aya of Alexandria + Breath of Fury + Encroaching Mycosynth + Temur Ascendancy

Aya of Alexandria

Breath of Fury

Encroaching Mycosynth

Temur Ascendancy

How it works

1. Deal combat damage using the creature that has Breath of Fury attached.
2. Breath of Fury and Aya of Alexandria trigger.
3. Resolve the Aya of Alexandria trigger, creating a 1/1 Assassin creature token.
4. Resolve the Breath of Fury trigger, 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.
5. Repeat each combat phase.

This clever loop relies on Encroaching Mycosynth to turn all your nonland permanents into artifacts, making Aya of Alexandria a historic creature that can trigger itself upon dealing combat damage. Once Aya of Alexandria deals damage, Breath of Fury triggers to sacrifice her, jump to the newly created Assassin token, untap your board, and grant an extra combat phase. Meanwhile, Temur Ascendancy ensures your newly entering tokens have haste right away, keeping the chain moving smoothly across an endless succession of combat steps.