How can you create a combo with Prosper, Tome-Bound, Ugin, the Ineffable, Eternal Scourge, Planar Void, Altar of Dementia?
user
[START OF COMBO]This combo can be formed with Prosper, Tome-Bound, Ugin, the Ineffable, Eternal Scourge, Planar Void, Altar of Dementia

Color identity: BR
Mana cost: {1}
Steps:
  1. Activate Altar of Dementia by sacrificing Eternal Scourge.
  2. Planar Void triggers, exiling Eternal Scourge from your graveyard.
  3. Resolve the Altar of Dementia ability, milling target player for an amount equal to Eternal Scourge's power.
  4. Cast Eternal Scourge for {1}.
  5. Prosper triggers, creating a Treasure token.
  6. Resolve Eternal Scourge, allowing it to enter the battlefield.
  7. Activate the Treasure token by tapping and sacrificing it, adding one mana of any color.
  8. Repeat.[END OF COMBO STEPS]

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

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