How can you create a combo with Chain of Acid, Archmage Emeritus?
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[START OF COMBO]This combo can be formed with Chain of Acid, Archmage Emeritus

Color identity: GU
Mana cost: {3}{G}
Steps:
  1. Cast Chain of Acid by paying {3}{G}, targeting any indestructible noncreature permanent you control.
  2. Archmage Emeritus triggers, causing you to draw a card.
  3. Resolve Chain of Acid, failing to destroy the indestructible permanent and choosing to copy Chain of Acid, targeting the indestructible permanent with the copy.
  4. Repeat from step 2.[END OF COMBO STEPS]

Result:
  - Infinite card draw
  - Infinite draw triggers
  - Near-infinite magecraft triggers[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Chain of Acid must be in your hand
  - Archmage Emeritus must be on the battlefield
  - You control an indestructible noncreature permanent.
[END OF COMBO PREREQUISITES]
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