How can you create a combo with Necrotic Ooze, Heroes' Bane, Crystalline Crawler?
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[START OF COMBO]This combo can be formed with Necrotic Ooze, Heroes' Bane, Crystalline Crawler

Color identity: BG
Mana cost: {2}{G}{G}
Steps:
  1. Activate Necrotic Ooze using Heroes' Bane's ability by paying {2}{G}{G}, putting at least five +1/+1 counters on it.
  2. Activate Necrotic Ooze using Crystalline Crawler's first ability four times by removing four +1/+1 counters from it, adding {2}{G}{G}.
  3. Repeat[END OF COMBO STEPS]

Result:
  - Infinite +1/+1 counters on Necrotic Ooze
  - Infinite colored mana[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Necrotic Ooze must be on the battlefield
  - Heroes' Bane must be in the graveyard
  - Crystalline Crawler must be in the graveyard
  - Necrotic Ooze has power 5 or greater.
[END OF COMBO PREREQUISITES]
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