Myr Welder, Staff of Domination, and Khalni Gem

Prerequisites

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

Steps

1. Activate Myr Welder by tapping it, exiling Staff of Domination from your graveyard
2. Activate Myr Welder using Staff of Domination's first ability by paying , untapping Myr Welder
3. Activate Myr Welder by tapping it, exiling Khalni Gem from your graveyard
4. Activate Myr Welder using Staff of Domination's first ability by paying , untapping Myr Welder
5. Activate Myr Welder using Khalni Gem's ability by tapping it, adding two mana of any one color
6. Repeat from step 4

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