Myr Welder, Staff of Domination, and Khalni Gem

Prerequisites

• Myr Welder on the battlefield
• Staff of Domination in exile
• Khalni Gem in exile

Steps

1. Activate Myr Welder using Khalni Gem's ability by tapping it, adding two mana of any color Activate Myr Welder using Staff of Domination's first ability by paying , untapping it
2. Repeat

Results

• Infinite card draw
• Infinite colored mana
• Infinite draw triggers
• Infinite lifegain
• Infinite lifegain triggers
• Infinite mana creatures you control can produce
• Infinite untap of creatures you control