Myr Welder, Staff of Domination, and Chromatic Orrery

Prerequisites

• Myr Welder on the battlefield
• Staff of Domination in the graveyard
• Chromatic Orrery 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 Chromatic Orrery from your graveyard
4. Activate Myr Welder using Staff of Domination's first ability by paying , untapping Myr Welder
5. Activate Myr Welder using Chromatic Orrery's first ability by tapping it, adding
6. Repeat from step 4

Results

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