How can you create a combo with Archon of Falling Stars, Gift of Immortality, Altar of Dementia?
user
[START OF COMBO]This combo can be formed with Archon of Falling Stars, Gift of Immortality, Altar of Dementia

Color identity: W
Mana cost: 
Steps:
  1. Activate Altar of Dementia by sacrificing Archon of Falling Stars.
  2. Archon of Falling Stars dies, triggering itself and Gift of Immortality.
  3. Resolve the Gift of Immortality trigger, returning Archon of Falling Stars from your graveyard to the battlefield.
  4. Resolve the Archon of Falling Stars trigger, returning Gift of Immortality from your graveyard to the battlefield attached to Archon of Falling Stars.
  5. Resolve the Altar of Dementia ability from step 1, causing target player to mill cards equal to Archon of Falling Stars' power.
  6. Repeat.[END OF COMBO STEPS]

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

Other prerequisites:
  - All permanants must be on the battlefield
  - Gift of Immortality attached to Archon of Falling Stars.
[END OF COMBO PREREQUISITES]
assistant