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

Prerequisites

• Breath of Fury attached to Harnessed Snubhorn.
• An opponent cannot block and kill creatures you control.

Steps

1. 1Deal combat damage to an opponent using Harnessed Snubhorn, triggering it and Breath of Fury.
2. 2Resolve the Harnessed Snubhorn trigger, returning Phyrexian Metamorph from your graveyard to the battlefield as a copy of Harnessed Snubhorn.
3. 3Resolve 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. 4Move to your next combat phase.
5. 5Deal combat damage to an opponent using Phyrexian Metamorph, triggering it and Breath of Fury.
6. 6Resolve the Phyrexian Metamorph trigger, returning Harnessed Snubhorn from your graveyard to the battlefield.
7. 7Resolve 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. 8Move to your next combat phase.
9. 9Repeat.

Effects

• Infinite combat damage
• Infinite combat phases
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers
• Infinite mana creatures you control can produce
• Infinite untap of creatures you control