How can you create a combo with Incubation Druid, Cloudstone Curio, Frog Tongue, Instill Energy?
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[START OF COMBO]This combo can be formed with Incubation Druid, Cloudstone Curio, Frog Tongue, Instill Energy

Color identity: G
Mana cost: 
Steps:
  1. Activate Incubation Druid by tapping it, adding {G}{G}{G}.
  2. Activate Instill Energy by paying {0}, untapping Incubation Druid.
  3. Cast Frog Tongue by paying {G}, attaching it to Incubation Druid.
  4. Frog Tongue enters the battlefield, triggering itself and Cloudstone Curio.
  5. Resolve the Frog Tongue trigger, causing you to draw a card.
  6. Resolve the Cloudstone Curio trigger, returning Instill Energy from the battlefield to your hand.
  7. Cast Instill Energy by paying {G}, attaching it to Incubation Druid.
  8. Instill Energy enters the battlefield, triggering Cloudstone Curio, returning Frog Tongue from the battlefield to your hand.
  9. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite card draw
  - Infinite draw triggers
  - Near-infinite mana lands you control can produce
  - Near-infinite storm count[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Incubation Druid must be on the battlefield
  - Cloudstone Curio must be on the battlefield
  - Frog Tongue must be in your hand
  - Instill Energy must be on the battlefield
  - Instill Energy attached to Incubation Druid.
  - Incubation Druid has at least one +1/+1 counter on it.
  - You control a land that can tap to produce {G}.
[END OF COMBO PREREQUISITES]
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