How can you create a combo with Myr Welder, Staff of Domination, Prismatic Geoscope?
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[START OF COMBO]This combo can be formed with Myr Welder, Staff of Domination, Prismatic Geoscope

Color identity: C
Mana cost: {2}
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 Prismatic Geoscopes 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 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.[END OF COMBO STEPS]

Result:
  - 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[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Myr Welder must be on the battlefield
  - Staff of Domination must be in the graveyard
  - Prismatic Geoscope must be in the graveyard
  - Myr Welder does not have summoning sickness.
  - You control at least two different basic land types.
[END OF COMBO PREREQUISITES]
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