How can you create a combo with Spectral Arcanist, Corpse Dance, Ashnod's Altar, Pitiless Plunderer?
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[START OF COMBO]This combo can be formed with Spectral Arcanist, Corpse Dance, Ashnod's Altar, Pitiless Plunderer

Color identity: UB
Mana cost: 
Steps:
  1. Activate Ashnod's Altar by sacrificing Spectral Arcanist, adding {C}{C}.
  2. Spectral Arcanist dies, triggering Pitiless Plunderer, creating a Treasure token.
  3. Activate the Treasure token by tapping and sacrificing it, adding {B}.
  4. Cast Corpse Dance by paying {2}{B}, returning Spectral Arcanist from your graveyard to the battlefield with haste.
  5. Spectral Arcanist enters the battlefield, triggering its ability.
  6. Holding priority, activate Ashnod's Altar by sacrificing Spectral Arcanist, adding {C}{C}.
  7. Spectral Arcanist dies, triggering Pitiless Plunderer, creating a Treasure token.
  8. Resolve the Spectral Arcanist trigger, casting Corpse Dance from your graveyard with buyback by paying {2}.
  9. Resolve Corpse Dance, returning Spectral Arcanist from your graveyard to the battlefield, and returning Corpse Dance to your hand.
  10. Spectral Arcanist enters the battlefield, allowing you to cast any instant or sorcery spell from your graveyard without paying its mana cost.
  11. Repeat.[END OF COMBO STEPS]

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

Other prerequisites:
  - Spectral Arcanist must be on the battlefield
  - Corpse Dance must be in your hand
  - Ashnod's Altar must be on the battlefield
  - Pitiless Plunderer must be on the battlefield
  - You control at least two additional Spirits.
[END OF COMBO PREREQUISITES]
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