Myr Welder + Staff of Domination + Sol Ring

Myr Welder
Staff of Domination
Sol Ring

Requires
Myr Welder on the battlefield. All other permanents in graveyard. Myr Welder does not have summoning sickness. 2 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 1, untapping Myr Welder
  3. Activate Myr Welder by tapping it, exiling Sol Ring from your graveyard
  4. Activate Myr Welder using Staff of Domination's first ability by paying 1, untapping Myr Welder
  5. Activate Myr Welder using Sol Ring's ability by tapping it, adding cc
  6. Repeat from step 4
Results
Infinite colorless mana. Infinite card draw. Infinite lifegain. Infinite lifegain triggers.