How can you create a combo with Karn, the Great Creator, Voltaic Construct, Grim Monolith?
user
[START OF COMBO]This combo can be formed with Karn, the Great Creator, Voltaic Construct, Grim Monolith

Color identity: C
Mana cost: 
Steps:
  1. Activate Karn's first loyalty ability, causing Grim Monolith to become an artifact creature until end of turn.
  2. Activate Grim Monolith by tapping it, adding {C}{C}{C}.
  3. Activate Voltaic Construct by paying {2}, untapping Grim Monolith.
  4. Repeat from step 2.[END OF COMBO STEPS]

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

Other prerequisites:
  - All permanants must be on the battlefield
  - Grim Monolith does not have summoning sickness.
[END OF COMBO PREREQUISITES]
assistant