How can you create a combo with Nettle Sentinel, Banishing Knack, Earthcraft?
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[START OF COMBO]This combo can be formed with Nettle Sentinel, Banishing Knack, Earthcraft

Color identity: GU
Mana cost: {G}{U}
Steps:
  1. Cast Banishing Knack by paying {U}, targeting Nettle Sentinel.
  2. Cast the green creature card from your hand by paying its mana cost.
  3. Nettle Sentinel triggers, untapping itself.
  4. Activate Earthcraft by tapping the green creature, untapping a basic Forest you control.
  5. Activate the Forest by tapping it, adding {G}.
  6. Activate Nettle Sentinel by tapping it, returning the green creature from the battlefield to your hand.
  7. Repeat from step 2.[END OF COMBO STEPS]

Result:
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite storm count[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Nettle Sentinel must be on the battlefield
  - Banishing Knack must be in your hand
  - Earthcraft must be on the battlefield
  - You have a green creature card in hand that can be cast using {G}.
  - You control a basic Forest.
  - Nettle Sentinel does not have summoning sickness.
[END OF COMBO PREREQUISITES]
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