How can you create a combo with Ascend from Avernus, Dualcaster Mage, Altar of Dementia?
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[START OF COMBO]This combo can be formed with Ascend from Avernus, Dualcaster Mage, Altar of Dementia

Color identity: RW
Mana cost: {4}{W}{W}{W}{R}{R}
Steps:
  1. Cast Ascend from Avernus by paying {3}{W}{W}{W}.
  2. Holding priority, cast Dualcaster Mage by paying {1}{R}{R}.
  3. Dualcaster Mage enters the battlefield, creating a copy of Ascend from Avernus.
  4. Activate Altar of Dementia by sacrificing Dualcaster Mage, causing target player to mill cards equal to Dualcaster Mage's power.
  5. Resolve the copy of Ascend from Avernus, returning all creature and planeswalker cards with mana value three or less from your graveyard to the battlefield.
  6. Repeat from step 3.[END OF COMBO STEPS]

Result:
  - Infinite blinking of all creatures and planeswalkers with mana value three or less
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite magecraft triggers
  - Infinite mill
  - Infinite sacrifice triggers
  - Infinite self-mill[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Ascend from Avernus must be in your hand
  - Dualcaster Mage must be in your hand
  - Altar of Dementia must be on the battlefield
[END OF COMBO PREREQUISITES]
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