How can you create a combo with Witch Engine, Corpse Dance, Ashnod's Altar?
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[START OF COMBO]This combo can be formed with Witch Engine, Corpse Dance, Ashnod's Altar

Color identity: B
Mana cost: 
Steps:
  1. Activate Witch Engine by tapping it, targeting any opponent.
  2. Holding priority, activate Ashnod's Altar by sacrificing Witch Engine, adding {C}{C}.
  3. Resolve the Witch Engine ability, adding {B}{B}{B}{B} and not giving control of Witch Engine to an opponent due to it no longer being on the battlefield.
  4. Cast Corpse Dance with buyback by paying {4}{B}, returning Witch Engine from your graveyard to the battlefield with haste, and returning Corpse Dance to your hand.
  5. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite black mana
  - Infinite colorless mana
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite magecraft triggers
  - Infinite sacrifice triggers
  - Infinite storm count[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Witch Engine must be on the battlefield
  - Corpse Dance must be in your hand
  - Ashnod's Altar must be on the battlefield
[END OF COMBO PREREQUISITES]
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