How can you create a combo with Basalt Monolith, Workshop Elders, Heartstone?
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[START OF COMBO]This combo can be formed with Basalt Monolith, Workshop Elders, Heartstone

Color identity: U
Mana cost: 
Steps:
  1. At the beginning of combat, Workshop Elders triggers, making Basalt Monolith a 0/0 artifact creature until end of turn and putting four +1/+1 counters on it.
  2. Activate Basalt Monolith's first ability by tapping it, adding {C}{C}{C}.
  3. Activate Basalt Monolith's last ability by paying {2}, untapping it.
  4. 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
  - Basalt Monolith does not have summoning sickness.
[END OF COMBO PREREQUISITES]
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