How can you create a combo with Sigarda's Summons, Bishop of Wings, Cathars' Crusade, Altar of Dementia?
user
[START OF COMBO]This combo can be formed with Sigarda's Summons, Bishop of Wings, Cathars' Crusade, Altar of Dementia

Color identity: W
Mana cost: 
Steps:
  1. Activate Altar of Dementia by sacrificing an Angel.
  2. Bishop of Wings triggers, creating a 1/1 Spirit creature token.
  3. The Spirit enters the battlefield, triggering Cathars' Crusade, putting a +1/+1 counter on each creature you control.
  4. The Spirit token becomes a 4/4 Spirit Angel due to having a +1/+1 counter on it.
  5. Resolve Altar of Dementia's ability, causing target player to mill cards equal to the Angel's power.
  6. Activate Altar of Dementia by sacrificing the Spirit token.
  7. Repeat from step 2.[END OF COMBO STEPS]

Result:
  - Infinite +1/+1 counters
  - 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
  - You control an additional Angel.
[END OF COMBO PREREQUISITES]
assistant