How can you create a combo with Bontu's Monument, Pitiless Plunderer, Oathsworn Vampire, Altar of Dementia?
user
[START OF COMBO]This combo can be formed with Bontu's Monument, Pitiless Plunderer, Oathsworn Vampire, Altar of Dementia

Color identity: B
Mana cost: {B}
Steps:
  1. Cast Oathsworn Vampire either from your hand or from your graveyard by paying {B} due to Bontu's Monument.
  2. Bontu's Monument triggers, causing each opponent to lose 1 life and you to gain 1 life.
  3. Activate Altar of Dementia by sacrificing Oathsworn Vampire.
  4. When Oathsworn Vampire dies, Pitiless Plunderer triggers, creating a Treasure artifact token.
  5. Resolve the Altar of Dementia ability, causing target player to mill cards equal to Oathsworn Vampire's power.
  6. Activate the Treasure by tapping and sacrificing it, adding {B}.
  7. 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
  - Infinite storm count[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Bontu's Monument must be on the battlefield
  - Pitiless Plunderer must be on the battlefield
  - Oathsworn Vampire must be in your hand or in the graveyard
  - Altar of Dementia must be on the battlefield
  - You have gained life this turn if Oathsworn Vampire is in your graveyard.
[END OF COMBO PREREQUISITES]
assistant