How can you create a combo with Priest of Forgotten Gods, Thornbite Staff, Gravecrawler, Chalk Outline?
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[START OF COMBO]This combo can be formed with Priest of Forgotten Gods, Thornbite Staff, Gravecrawler, Chalk Outline

Color identity: BG
Mana cost: 
Steps:
  1. Activate Priest of Forgotten Gods by tapping it and sacrificing Gravecrawler and any other creature.
  2. When the creatures die, Priest of Forgotten Gods triggers twice, untapping itself.
  3. Resolve the Priest of Forgotten Gods ability, causing any number of opponents to sacrifice a creature and lose 2 life, and causing you to add {B}{B} and draw a card.
  4. Cast Gravecrawler from your graveyard by paying {B}.
  5. Chalk Outline triggers, creating a 2/2 Detective creature token and a Clue token.
  6. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite card draw
  - Near-infinite lifeloss
  - Near-infinite enters the battlefield
  - Infinite draw triggers
  - Near-infinite leaves the battlefield
  - Near-infinite death triggers
  - Near-infinite sacrifice triggers
  - Near-infinite black mana
  - Near-infinite Clue tokens[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - Thornbite Staff attached to Priest of Forgotten Gods.
  - Priest of Forgotten Gods does not have summoning sickness.
  - You control at least one Zombie, and at least one additional creature except Gravecrawler or the Zombie.
[END OF COMBO PREREQUISITES]
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