the front side of Karn, Silver Golem
the back of a classic MtG card
the front side of Freed from the Real
the back of a classic MtG card
the front side of Doubling Cube
the back of a classic MtG card

Color Identity: U

Initial Card State

  1.  Freed from the Real in hand.
  2.  Karn and Doubling Cube on the battlefield.

Mana Needed

  1. eight generic manaone blue manaone blue mana available.

Steps

  1. Activate Doubling Cube by paying three generic mana and tapping it, doubling your unspent mana.
  2. Activate Karn by paying one generic mana, causing Doubling Cube to become an artifact creature until end of turn.
  3. Cast Freed from the Real by paying two generic manaone blue mana, enchanting Doubling Cube.
  4. Activate Freed from the Real's second ability by paying one blue mana, untapping Doubling Cube.
  5. Activate Doubling Cube by paying three generic mana and tapping it, doubling your unspent mana.
  6. Repeat from step 4.

Results

  1. Infinite colored mana.
  2. Infinite colorless mana.
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