How can you create a combo with Necrotic Ooze, Hardened Scales, Cryptic Trilobite, Farmstead Gleaner, Walking Ballista?
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[START OF COMBO]This combo can be formed with Necrotic Ooze, Hardened Scales, Cryptic Trilobite, Farmstead Gleaner, Walking Ballista

Color identity: BG
Mana cost: 
Steps:
  1. Pay {1} and tap Necrotic Ooze using the Trilobite's ability to put a +1/+1 counter on it.
  2. Hardened Scales doubles this.
  3. Remove 2 +1/+1 counters from Necrotic Ooze using the Trilobite's ability to generate {4} for activated abilities.
  4. Pay {2} and untap Necrotic Ooze using Farmstead Gleaner's ability and put 2 +1/+1 counters on Necrotic Ooze.
  5. You have {2} floating and Necrotic Ooze with 2 counters.
  6. Repeat to generate infinite {C} for activated abilities, and Necrotic Ooze having infinite +1/+1 counters Remove counters from Necrotic Ooze using Walking Ballista's ability to ping an opponent.
  7. Repeat to ping your opponent to death.[END OF COMBO STEPS]

Result:
  - Infinite colorless mana for activated abilities
  - Infinite damage[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Necrotic Ooze must be on the battlefield
  - Hardened Scales must be on the battlefield
  - Cryptic Trilobite must be in the graveyard
  - Farmstead Gleaner must be in the graveyard
  - Walking Ballista must be in the graveyard
  - Necrotic Ooze does not have summoning sickness.
[END OF COMBO PREREQUISITES]
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