How can you create a combo with Oathsworn Vampire, Ashnod's Altar, Pitiless Plunderer, Blood Artist?
user
[START OF COMBO]This combo can be formed with Oathsworn Vampire, Ashnod's Altar, Pitiless Plunderer, Blood Artist

Color identity: B
Mana cost: 
Steps:
  1. Activate Ashnod's Altar by sacrificing Oathsworn Vampire, adding {2}.
  2. Pitiless Plunderer and Blood Artist trigger.
  3. Resolve Pitiless Plunderer's ability, creating a Treasure token.
  4. Activate the Treasure token by tapping and sacrificing it, adding {B}.
  5. Resolve Blood Artist's ability, causing target opponent to lose 1 life and you to gain 1 life.
  6. Cast Oathsworn Vampire from your graveyard by paying {1}{B}.
  7. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite colorless mana
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite lifegain
  - Infinite lifegain triggers
  - Infinite lifeloss
  - Infinite leaves the battlefield[END OF COMBO RESULT][END OF COMBO]

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