Myr Welder, High Alert, and Nyx Lotus

Prerequisites

• Myr Welder on the battlefield
• High Alert on the battlefield
• Nyx Lotus in exile
• available

Steps

1. Activate Myr Welder using Nyx Lotus's ability by tapping it, adding an amount of or equal to your devotion to that color
2. Activate High Alert by paying , untapping Myr Welder
3. Repeat

Results

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