How can you create a combo with Hapatra, Vizier of Poisons, Cathars' Crusade, Devoted Druid?
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[START OF COMBO]This combo can be formed with Hapatra, Vizier of Poisons, Cathars' Crusade, Devoted Druid

Color identity: WBG
Mana cost: 
Steps:
  1. Activate Devoted Druid by tapping it, adding {G}.
  2. Activate Devoted Druid's second ability by putting a -1/-1 counter on it, untapping it.
  3. Hapatra triggers, creating a 1/1 Snake creature token.
  4. The Snake enters the battlefield, triggering Cathars' Crusade, putting a +1/+1 counter on each creature you control.
  5. Repeat.[END OF COMBO STEPS]

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

Other prerequisites:
  - All permanants must be on the battlefield
  - Devoted Druid does not have summoning sickness.
  - Devoted Druid does not have a -1/-1 counter on it.
[END OF COMBO PREREQUISITES]
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