How can you create a combo with Yarus, Roar of the Old Gods, Master of the Veil, Altar of Dementia?
user
[START OF COMBO]This combo can be formed with Yarus, Roar of the Old Gods, Master of the Veil, Altar of Dementia

Color identity: GUR
Mana cost: 
Steps:
  1. Activate Altar of Dementia by sacrificing Master of the Veil.
  2. When Master of the Veil dies, Yarus' second ability triggers, returning Master of the Veil from your graveyard to the battlefield face down, then turning it face up.
  3. Master of the Veil triggers, turning itself face down.
  4. Resolve the Altar of Dementia ability, causing target player to mill cards equal to Master of the Veil's power.
  5. 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
[END OF COMBO PREREQUISITES]
assistant