How can you create a combo with Crystalline Crawler, Gideon's Sacrifice, Vigor, Pestilence Demon?
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[START OF COMBO]This combo can be formed with Crystalline Crawler, Gideon's Sacrifice, Vigor, Pestilence Demon

Color identity: WBG
Mana cost: {W}{B}
Steps:
  1. Cast Gideon's Sacrifice by paying {W}, causing all damage that would be dealt this turn to you or to permanents you control to be dealt to Crystalline Crawler instead.
  2. Activate Pestilence Demon by paying {B}, dealing 1 damage to each creature and each player.
  3. Gideon's Sacrifice redirects damage to Crawler, which results in at least four +1/+1 counters being placed on it instead due to Vigor.
  4. Activate Crystalline Crawler's first activated ability at least once by removing at least one +1/+1 counter from it, adding at least {B}.
  5. Repeat from step 2.[END OF COMBO STEPS]

Result:
  - Infinite +1/+1 counters on Crystalline Crawler
  - Infinite colored mana
  - Infinite damage to opponent and each creature your opponents control[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Crystalline Crawler must be on the battlefield
  - Gideon's Sacrifice must be in your hand
  - Vigor must be on the battlefield
  - Pestilence Demon must be on the battlefield
[END OF COMBO PREREQUISITES]
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