How can you create a combo with Young Necromancer, Altar of Dementia?
user
[START OF COMBO]This combo can be formed with Young Necromancer, Altar of Dementia

Color identity: B
Mana cost: {4}{B}
Steps:
  1. Cast Young Necromancer by paying {4}{B}.
  2. Young Necromancer enters the battlefield, triggering its ability.
  3. Holding priority, activate Altar of Dementia by sacrificing Young Necromancer, causing you to mill two cards.
  4. Resolve the Young Necromancer trigger, exiling two cards from your graveyard except Young Necromancer, and returning Young Necromancer from your graveyard to the battlefield.
  5. Repeat from step 2.[END OF COMBO STEPS]

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

Other prerequisites:
  - Young Necromancer must be in your hand
  - Altar of Dementia must be on the battlefield
[END OF COMBO PREREQUISITES]
assistant