How can you create a combo with Mortuary, Digsite Conservator, Ashnod's Altar, Sifter of Skulls?
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[START OF COMBO]This combo can be formed with Mortuary, Digsite Conservator, Ashnod's Altar, Sifter of Skulls

Color identity: B
Mana cost: 
Steps:
  1. Activate Ashnod's Altar by sacrificing Digsite Conservator, adding {C}{C}.
  2. When Digsite Conservator dies, it, Mortuary and Sifter of Skulls trigger.
  3. Resolve the Sifter of Skulls trigger, creating a 1/1 Eldrazi Scion creature token.
  4. Activate Ashnod's Altar by sacrificing the Eldrazi Scion, adding {C}{C}.
  5. Resolve the Mortuary trigger, putting Digsite Conservator on top of your library from your graveyard.
  6. Resolve the Digsite Conservator trigger, causing you to pay {4} to exile Digsite Conservator from the top of your library and cast it without paying its mana cost.
  7. Repeat.[END OF COMBO STEPS]

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

Other prerequisites:
  - All permanants must be on the battlefield
[END OF COMBO PREREQUISITES]
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