How can you create a combo with Boonweaver Giant, Fool's Demise, Altar of Dementia?
user
[START OF COMBO]This combo can be formed with Boonweaver Giant, Fool's Demise, Altar of Dementia

Color identity: WU
Mana cost: 
Steps:
  1. Activate Altar of Dementia by sacrificing Boonweaver Giant.
  2. Boonweaver Giant dies, triggering Fool's Demise's first and second abilities.
  3. Resolve Fool's Demise's first trigger, returning Boonweaver Giant to the battlefield.
  4. Boonweaver Giant enters the battlefield, returning Fool's Demise from your graveyard to the battlefield attached to Boonweaver Giant.
  5. Fool's Demise's second trigger from step 2 fails to resolve  due to having no legal target.
  6. Resolve the Altar of Dementia ability from step 1, causing target player to mill cards equal to Boonweaver Giant's power.
  7. 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
  - Fool's Demise attached to Boonweaver Giant.
[END OF COMBO PREREQUISITES]
assistant