How can you create a combo with Mortuary, Bolas's Citadel, Gray Merchant of Asphodel, Altar of Dementia?
user
[START OF COMBO]This combo can be formed with Mortuary, Bolas's Citadel, Gray Merchant of Asphodel, Altar of Dementia

Color identity: B
Mana cost: 
Steps:
  1. Sacrifice Gray Merchant of Asphodel to Altar of Dementia, milling a player two cards.
  2. Mortuary triggers, putting Gray Merchant of Asphodel on top of your library.
  3. Cast Gray Merchant of Asphodel, paying five life with Bolas's Citadel.
  4. Gray Merchant of Asphodel triggers, causing each opponent to lose at least 6 life and gaining you that much life.
  5. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite lifegain
  - Infinite lifegain triggers
  - Infinite lifeloss
  - Infinite leaves the battlefield
  - Infinite mill
  - Infinite sacrifice triggers
  - Infinite self-mill[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - You have 6 or more life.
[END OF COMBO PREREQUISITES]
assistant