the front side of Urza, Prince of Kroog
the back of a classic MtG card
the front side of Doubling Cube
the back of a classic MtG card
the front side of Ring of Valkas
the back of a classic MtG card

Color Identity: W, U

Initial Card State

  1.  All permanents on the battlefield.

Mana Needed

  1. eleven generic mana available.

Steps

  1. Float at least eleven generic mana.
  2. Activate Doubling Cube by paying three generic mana and tapping it, adding at least eight generic mana.
  3. Activate Urza by paying six generic mana, creating a token copy of Doubling Cube that is a 1/1 Soldier.
  4. Activate Ring of Valkas' equip ability by paying one generic mana, attaching it to the Doubling Cube token.
  5. Repeat from step 2 using the Doubling Cube token instead.
  6. Once you have infinite mana, you may target any artifact you control to get infinite copies of them.

Results

  1. Infinite copies of artifacts you control.
  2. Infinite creature tokens.
  3. Infinite creature ETB.
  4. Infinite mana permanents you control can produce.
  5. Infinite creature copies of artifacts you control.
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