How can you create a combo with Kinnan, Bonder Prodigy, Grim Monolith, Spark Double?
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[START OF COMBO]This combo can be formed with Kinnan, Bonder Prodigy, Grim Monolith, Spark Double

Color identity: GU
Mana cost: 
Steps:
  1. Activate Grim Monolith's first ability by tapping it, adding {5}.
  2. Activate Grim Monolith's last ability by paying {4}, untapping it.
  3. 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
  - Spark Double is a copy of Kinnan.
[END OF COMBO PREREQUISITES]
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