How can you create a combo with Ashnod the Uncaring, Bonecaller Cleric, Dockside Extortionist, Altar of Dementia?
user
[START OF COMBO]This combo can be formed with Ashnod the Uncaring, Bonecaller Cleric, Dockside Extortionist, Altar of Dementia

Color identity: UBR
Mana cost: {3}{B}
Steps:
  1. Activate Altar of Dementia by sacrificing Dockside Extortionist, targeting any player.
  2. Ashnod the Uncaring triggers, copying Altar of Dementia's ability, targeting any player.
  3. Resolve both Altar of Dementia abilities, causing target player to mill cards equal to Dockside Extortionist's power twice.
  4. Activate Bonecaller Cleric by paying {3}{B} and sacrificing it, targeting Dockside Extortionist.
  5. Ashnod the Uncaring triggers, copying Bonecaller Cleric's ability, with the copy targeting Bonecaller Cleric.
  6. Resolve both Bonecaller Cleric abilities, returning it and Dockside Extortionist to the battlefield from your graveyard.
  7. When Dockside Extortionist enters the battlefield, it triggers, creating at least three Treasure artifact tokens.
  8. Activate three Treasures by tapping and sacrificing them, adding {3}.
  9. Repeat.
  10. If opponents control four or more artifacts and/or enchantments, this combo nets infinite Treasure tokens.[END OF COMBO STEPS]

Result:
  - Infinite colored mana
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite mill
  - Infinite sacrifice triggers
  - Infinite self-mill
  - Infinite Treasure tokens[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - Opponents control at least four artifacts and/or enchantments.
[END OF COMBO PREREQUISITES]
assistant