How can you create a combo with Roxanne, Starfall Savant, Basalt Monolith, Replication Specialist?
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[START OF COMBO]This combo can be formed with Roxanne, Starfall Savant, Basalt Monolith, Replication Specialist

Color identity: GUR
Mana cost: {4}{U}
Steps:
  1. Cast Basalt Monolith by paying {3}.
  2. When Basalt Monolith enters the battlefield, Replication Specialist triggers, causing you to pay {1}{U} to create a token copy of Basalt Monolith.
  3. Activate the token Basalt Monolith's first ability by tapping it, adding {C}{C}{C}.
  4. Roxanne's second ability triggers, adding {C}.
  5. Activate the token Basalt Monolith's second ability by paying {3}, untapping it.
  6. Repeat from step 3.[END OF COMBO STEPS]

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

Other prerequisites:
  - Roxanne, Starfall Savant must be on the battlefield
  - Basalt Monolith must be in your hand
  - Replication Specialist must be on the battlefield
[END OF COMBO PREREQUISITES]
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