How can you create a combo with The World Spell, Cloudstone Curio, Lithoform Engine, Clever Impersonator, Altar of the Brood?
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[START OF COMBO]This combo can be formed with The World Spell, Cloudstone Curio, Lithoform Engine, Clever Impersonator, Altar of the Brood

Color identity: GU
Mana cost: {2}
Steps:
  1. At the beginning of your precombat main phase, The World Spell triggers, putting a lore counter on itself.
  2. The World Spell's third chapter ability triggers.
  3. Holding priority, activate Lithoform Engine's first ability by paying {2} and targeting it, copying The World Spell's trigger.
  4. Resolve the copy of The World Spell's trigger, putting Clever Impersonator and any non-Saga enchantment onto the battlefield from your hand.
  5. Choose to have Clever Impersonator enter the battlefield as a copy of The World Spell, with three lore counters due to its read-ahead ability.
  6. Clever Impersonator triggers once, and Cloudstone Curio and Altar of the Brood each trigger twice.
  7. Resolve both Altar of the Brood triggers, causing each opponent to mill two cards.
  8. Resolve both Cloudstone Curio triggers, returning Clever Impersonator and any other non-Saga enchantment from the battlefield to your hand.
  9. Resolve the Clever Impersonator trigger, putting it and the non-Saga enchantment onto the battlefield from your hand.
  10. Repeat from step 5.[END OF COMBO STEPS]

Result:
  - Infinite mill[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - The World Spell must be on the battlefield
  - Cloudstone Curio must be on the battlefield
  - Lithoform Engine must be on the battlefield
  - Clever Impersonator must be in your hand
  - Altar of the Brood must be on the battlefield
  - The World Spell has exactly two lore counters on it.
  - You have at least one non-Saga enchantment card in hand.
[END OF COMBO PREREQUISITES]
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