How can you create a combo with Sigil Captain, Rosie Cotton of South Lane, Crystalline Crawler, Ooze Flux, Doubling Season?
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[START OF COMBO]This combo can be formed with Sigil Captain, Rosie Cotton of South Lane, Crystalline Crawler, Ooze Flux, Doubling Season

Color identity: GW
Mana cost: {1}{G}
Steps:
  1. Activate Ooze Flux by paying {1}{G} and removing a +1/+1 counter from a creature you control, creating two 1/1 Ooze creature tokens.
  2. Rosie Cotton of South Lane triggers twice, putting two +1/+1 counters on Crystalline Crawler and any other creature you control due to Doubling Season.
  3. When the Oozes enters the battlefield, Sigil Captain triggers twice, putting four +1/+1 counters on each of them due to Doubling Season.
  4. Activate Crystalline Crawler's first ability twice by removing two +1/+1 counters from it, adding {1}{G}.
  5. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite +1/+1 counters
  - Infinite colored mana
  - Infinite creature tokens
  - Infinite enters the battlefield[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - You have at least one +1/+1 counter on a creature you control.
[END OF COMBO PREREQUISITES]
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