Breath of Fury + Harnessed Snubhorn + Encroaching Mycosynth + Phyrexian Metamorph + Urabrask the Hidden

Breath of Fury

Harnessed Snubhorn

Encroaching Mycosynth

Phyrexian Metamorph

Urabrask the Hidden

How it works

1. Deal combat damage to an opponent using Harnessed Snubhorn, triggering it and Breath of Fury.
2. Resolve the Harnessed Snubhorn trigger, returning Phyrexian Metamorph from your graveyard to the battlefield as a copy of Harnessed Snubhorn.
3. Resolve the Breath of Fury trigger, causing you to sacrifice Harnessed Snubhorn, then attach Breath of Fury to Phyrexian Metamorph, then causing you to untap all creatures you control and to get an additional combat phase after this one.
4. Move to your next combat phase.
5. Deal combat damage to an opponent using Phyrexian Metamorph, triggering it and Breath of Fury.
6. Resolve the Phyrexian Metamorph trigger, returning Harnessed Snubhorn from your graveyard to the battlefield.
7. Resolve the Breath of Fury trigger, causing you to sacrifice Phyrexian Metamorph, then attach Breath of Fury to Harnessed Snubhorn, then causing you to untap all creatures you control and to get an additional combat phase after this one.
8. Move to your next combat phase.
9. Repeat.