How can you create a combo with Clever Impersonator, Copy Enchantment, Oblivion Ring, Altar of the Brood?
user
[START OF COMBO]This combo can be formed with Clever Impersonator, Copy Enchantment, Oblivion Ring, Altar of the Brood

Color identity: WU
Mana cost: {4}{U}{U}{U}
Steps:
  1. Cast Copy Enchantment by paying {2}{U}.
  2. Copy Enchantment enters the battlefield, triggering Altar of the Brood and itself.
  3. Resolve the Altar of Brood trigger, causing each opponent to mill a card.
  4. Resolve the Copy Enchantment's trigger, becoming a copy of Oblivion Ring and exiling Oblivion Ring.
  5. Cast Clever Impersonator by paying {2}{U}{U}.
  6. Clever Impersonator enters the battlefield, triggering Altar of the Brood and itself.
  7. Resolve the Altar of Brood trigger, causing each opponent to mill a card.
  8. Resolve the Clever Impersonator's trigger, becoming a copy of Copy Enchantment and exiling Copy Enchantment.
  9. Copy Enchantment leaves the battlefield, returning Oblivion Ring from exile to the battlefield.
  10. Altar of the Brood and Oblivion Ring triggers.
  11. Resolve the Altar of Brood trigger, causing each opponent to mill a card.
  12. Resolve the Oblivion Ring's trigger, exiling Clever Impersonator.
  13. Clever Impersonator leaves the battlefield, returning Copy enchantment from exile to the battlefield.
  14. Repeat from step 2.[END OF COMBO STEPS]

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

Other prerequisites:
  - Clever Impersonator must be in your hand
  - Copy Enchantment must be in your hand
  - Oblivion Ring must be on the battlefield
  - Altar of the Brood must be on the battlefield
[END OF COMBO PREREQUISITES]
assistant