How can you create a combo with Dualcaster Mage, Riptide Laboratory, Turnabout?
user
[START OF COMBO]This combo can be formed with Dualcaster Mage, Riptide Laboratory, Turnabout

Color identity: UR
Mana cost: {4}{U}{U}{U}{R}{R}
Steps:
  1. Cast Turnabout by paying {2}{U}{U}, targeting any land you control.
  2. Holding priority, cast Dualcaster Mage by paying {1}{R}{R}.
  3. Dualcaster Mage enters the battlefield, copying Turnabout.
  4. Holding priority, activate Riptide Laboratory by paying {1}{U} and tapping it, returning Dualcaster Mage to your hand.
  5. Resolve the Turnabout copy, untapping all lands you control.
  6. Repeat from step 2.[END OF COMBO STEPS]

Result:
  - Infinite colored mana
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite storm count[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Dualcaster Mage must be in your hand
  - Riptide Laboratory must be on the battlefield
  - Turnabout must be in your hand
  - Other lands that can produce {2}{U}{R}{R} on the battlefield.
[END OF COMBO PREREQUISITES]
assistant