How can you create a combo with Spark Double, Puppeteer Clique, Altar of Dementia?
user
[START OF COMBO]This combo can be formed with Spark Double, Puppeteer Clique, Altar of Dementia

Color identity: UB
Mana cost: {3}{U}
Steps:
  1. Cast Spark Double, choosing to have it enter as a copy of Puppeteer Clique.
  2. Resolve its ETB trigger.
  3. Sacrifice it to Altar of Dementia targeting an opponent.
  4. Persist triggers, returning Spark Double with a -1/-1 counter, which is removed because of the +1/+1 counter that Spark Double enters with.
  5. Repeat to get every creature out of each opponent library and mill them all out.[END OF COMBO STEPS]

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

Other prerequisites:
  - Spark Double must be in your hand
  - Puppeteer Clique must be on the battlefield
  - Altar of Dementia must be on the battlefield
[END OF COMBO PREREQUISITES]
assistant