How can you create a combo with Dramatic Reversal, Lithoform Engine?
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[START OF COMBO]This combo can be formed with Dramatic Reversal, Lithoform Engine

Color identity: U
Mana cost: {1}{U}
Steps:
  1. Cast Dramatic Reversal, holding priority.
  2. Tap Lithoform Engine and spend {3} to activate the second ability of Lithoform Engine, copying Dramatic Reversal.
  3. Allow the Dramatic Reversal copy to resolve, untapping your nonland permanents.
  4. Tap your nonland mana sources for at least {4}.
  5. Repeat steps 2-4 for an infinite loop.[END OF COMBO STEPS]

Result:
  - Infinite colored mana
  - Infinite colorless mana
  - Infinite untap for nonland permanents[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Dramatic Reversal must be in your hand
  - Lithoform Engine must be on the battlefield
  - Nonland mana sources that can tap for at least {4} on the battlefield.
  - An additional
[END OF COMBO PREREQUISITES]
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