How can you create a combo with Rings of Brighthearth, Forsaken Monument, Grim Monolith?
user
[START OF COMBO]This combo can be formed with Rings of Brighthearth, Forsaken Monument, Grim Monolith

Color identity: C
Mana cost: {2}
Steps:
  1. Activate Grim Monolith's first ability by tapping it, adding {C}{C}{C}.
  2. Forsaken Monument triggers, adding {C}.
  3. Activate Grim Monolith's second ability by paying {4}.
  4. Rings of Brighthearth triggers, causing you to pay {2} to copy Grim Monolith's ability.
  5. Resolve the first Grim Monolith ability, untapping it.
  6. Activate Grim Monolith's first ability by tapping it, adding {C}{C}{C}.
  7. Forsaken Monument triggers, adding {C}.
  8. Resolve the second Grim Monolith ability from step 3, untapping it.
  9. Repeat.[END OF COMBO STEPS]

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

Other prerequisites:
  - All permanants must be on the battlefield
[END OF COMBO PREREQUISITES]
assistant