How can you create a combo with Karn, Legacy Reforged, Strionic Resonator, Clock of Omens, Staff of Domination, Grim Monolith?
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[START OF COMBO]This combo can be formed with Karn, Legacy Reforged, Strionic Resonator, Clock of Omens, Staff of Domination, Grim Monolith

Color identity: C
Mana cost: {2}
Steps:
  1. At the beginning of your upkeep, Karn triggers.
  2. Holding priority, activate Strionic Resonator by paying {2} and tapping it, copying Karn's ability.
  3. Resolve the copy of Karn's ability, adding {C} for each artifact you control that cannot be spent to cast nonartifact spells.
  4. Activate Clock of Omens by tapping Staff of Domination and Grim Monolith, untapping Strionic Resonator.
  5. Activate Staff of Domination's first ability by paying {1}, untapping it.
  6. Activate Grim Monolith's second ability by paying {4}, untapping it.
  7. Repeat from step 2.[END OF COMBO STEPS]

Result:
  - Infinite colorless mana that cannot be spent to cast nonartifact spells
  - Infinite mana artifacts you control can produce
  - Infinite untap of artifacts you control[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - You control at least three additional artifacts.
[END OF COMBO PREREQUISITES]
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