Glissa, Herald of Predation + Breath of Fury + Concordant Crossroads

Prerequisites

• Breath of Fury attached to another creature you control.
• You control at least one additional creature.
• An opponent cannot block and kill creatures you control.

Steps

1. 1At the beginning of your combat phase, Glissa triggers, creating two Incubator artifact tokens with two +1/+1 counters on them.
2. 2Deal combat damage to an opponent using the creature with Breath of Fury attached.
3. 3Breath of Fury triggers, causing you to sacrifice the creature it is attached to, then attach Breath of Fury to another creature you control, then causing you to untap all creatures you control and to get an additional combat phase after this one.
4. 4At the beginning of your next combat phase, Glissa triggers, transforming all Incubators you control into 0/0 Phyrexian artifact creatures.
5. 5Repeat steps 2 and 3 one additional time.
6. 6Repeat from step 1.

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