How can you create a combo with Myr Welder, Voltaic Construct, Grim Monolith?
user
[START OF COMBO]This combo can be formed with Myr Welder, Voltaic Construct, Grim Monolith

Color identity: C
Mana cost: {4}
Steps:
  1. Activate Myr Welder by tapping it, exiling Voltaic Construct from your graveyard.
  2. Activate Myr Welder using Voltaic Construct's ability by paying {2}, untapping Myr Welder.
  3. Activate Myr Welder by tapping it, exiling Grim Monolith from your graveyard.
  4. Activate Myr Welder using Voltaic Construct's ability by paying {2}, untapping Myr Welder.
  5. Activate Myr Welder using Grim Monolith's first ability by tapping it, adding {C}{C}{C}.
  6. Repeat from step 4.[END OF COMBO STEPS]

Result:
  - Infinite colorless mana[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Myr Welder must be on the battlefield
  - Voltaic Construct must be in the graveyard
  - Grim Monolith must be in the graveyard
  - Myr Welder does not have summoning sickness.
[END OF COMBO PREREQUISITES]
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