The Aetherspark, Brass Squire, Aggravated Assault, and Ayara, Widow of the Realm // Ayara, Furnace Queen

Prerequisites

• The Aetherspark in the graveyard
• Brass Squire on the battlefield
• Aggravated Assault on the battlefield
• Ayara, Widow of the Realm // Ayara, Furnace Queen on the battlefield

Steps

1. At the beginning of your combat phase, Ayara triggers, returning The Aetherspark from your graveyard to the battlefield
2. Activate Brass Squire by tapping it, attaching The Aetherspark to a creature you control that has power equal to 6
3. Deal combat damage to an opponent using the creature that has The Aetherspark attached, triggering The Aetherspark, putting six loyalty counters on it
4. Activate The Aetherspark's third loyalty ability by removing ten loyalty counters from it, adding ten
5. The Aetherspark is put into your graveyard as a state-based action due to having 0 loyalty
6. Activate Aggravated Assault by paying , causing you to untap all creatures you control and to get an additional combat and main phase after this one
7. Repeat

Results

• Infinite combat damage
• Infinite combat phases
• Infinite mana creatures you control can produce
• Infinite red mana
• Infinite untap of creatures you control