How can you create a combo with Ashnod's Altar, Bog Initiate, Gravecrawler?
user
[START OF COMBO]This combo can be formed with Ashnod's Altar, Bog Initiate, Gravecrawler

Color identity: B
Mana cost: 
Steps:
  1. Activate Ashnod's Altar by sacrificing Gravecrawler, adding {B}.
  2. Activate Bog Initiate by playing {1}, adding {B}.
  3. Cast Gravecrawler from your graveyard by paying {B}[END OF COMBO STEPS]

Result:
  - Infinite black mana
  - Infinite colorless mana
  - Infinite death triggers
  - Infinite sacrifice triggers
  - Infinite storm count[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - You control at least one additional Zombie.
[END OF COMBO PREREQUISITES]
assistant