the front side of Urza, Prince of Kroog
the back of a classic MtG card
the front side of Encroaching Mycosynth
the back of a classic MtG card
the front side of Training Grounds
the back of a classic MtG card
the front side of Urza, Lord High Artificer
the back of a classic MtG card

Color Identity: W, U

Initial Card State

  1.  All permanents on the battlefield.

Mana Needed

  1. five generic mana available.

Steps

  1. Activate Urza, Prince of Kroog by paying four generic mana, creating a token copy of Training Grounds that is a 1/1 Soldier in addition to its other types.
  2. Activate Urza, Lord High Artificer's first ability by tapping the Training Grounds token, adding one blue mana.
  3. Activate Urza, Prince of Kroog by paying two generic mana, creating a token copy of Training Grounds that is a 1/1 Soldier in addition to its other types.
  4. Activate Urza, Lord High Artificer's first ability by tapping the Training Grounds token, adding one blue mana.
  5. Activate Urza, Prince of Kroog by paying one generic mana, creating a token copy of Training Grounds that is a 1/1 Soldier in addition to its other types.
  6. Activate Urza, Lord High Artificer's first ability by tapping the Training Grounds token, adding one blue mana.
  7. Repeat from step 5.

Results

  1. Infinite creature ETB.
  2. Infinite tapped creature tokens.
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