Myr Welder, Staff of Domination, and Prismatic Geoscope

Prerequisites

• Myr Welder on the battlefield
• Staff of Domination in the graveyard
• Prismatic Geoscope 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 Prismatic Geoscopes from your graveyard
4. Activate Myr Welder using Staff of Domination's first ability by paying , untapping Myr Welder
5. Activate Myr Welder using Prismatic Geoscope's ability by tapping it, adding mana of any color equal to amount of basic land types you control
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