Myr Welder, Aggravated Assault, and Nyx Lotus

Prerequisites

• Myr Welder on the battlefield
• Aggravated Assault on the battlefield
• Nyx Lotus in exile

Steps

1. Activate Myr Welder using Nyx Lotus's ability by tapping it, adding at least
2. Activate Aggravated Assault by paying , untapping all creatures you control and causing you to get an additional combat phase after this one
3. Repeat

Results

• Infinite combat phases
• Infinite untap of creatures you control
• Infinite mana creatures you control can produce
• Infinite mana of colors you have devotion to