How can you create a combo with Aminatou, the Fateshifter, Spark Double, Altar of the Brood?
user
[START OF COMBO]This combo can be formed with Aminatou, the Fateshifter, Spark Double, Altar of the Brood

Color identity: WUB
Mana cost: 
Steps:
  1. Activate Aminatou's second loyalty ability by removing a loyalty counter from it, blinking Spark Double.
  2. Spark Double enters the battlefield as a non-legendary copy of Aminatou.
  3. Altar of the Brood triggers, causing each opponent to mill one card.
  4. Activate Spark Double's second loyalty ability by removing a loyalty counter from it, blinking Aminatou.
  5. Aminatou enters the battlefield, triggering Altar of the Brood, causing each opponent to mill one card.
  6. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite mill[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
[END OF COMBO PREREQUISITES]
assistant