How can you create a combo with Nim Deathmantle, Dockside Extortionist, Altar of Dementia?
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[START OF COMBO]This combo can be formed with Nim Deathmantle, Dockside Extortionist, Altar of Dementia

Color identity: R
Mana cost: {4}
Steps:
  1. Activate Altar of Dementia by sacrificing Dockside Extortionist.
  2. When Dockside Extortionist dies, Nim Deathmantle triggers, causing you to pay {4} to return Dockside Extortionist from your graveyard to the battlefield, and attach Nim Deathmantle to it.
  3. When Dockside Extortionist enters the battlefield, it triggers, creating at least five Treasure tokens.
  4. Resolve the Altar of Dementia ability from step 1, causing target player to mill cards equal to Dockside Extortionist's power.
  5. Activate four Treasures by tapping and sacrificing them, adding {4}.
  6. Repeat.[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 five artifacts and/or enchantments.
[END OF COMBO PREREQUISITES]
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