How can you create a combo with Urza, Prince of Kroog, Mycosynth Lattice, Training Grounds, Urza, Lord High Artificer?
user
[START OF COMBO]This combo can be formed with Urza, Prince of Kroog, Mycosynth Lattice, Training Grounds, Urza, Lord High Artificer

Color identity: WU
Mana cost: {5}
Steps:
  1. Activate Urza, Prince of Kroog by paying {4}, 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 {U}.
  3. Activate Urza, Prince of Kroog by paying {2}, 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 {U}.
  5. Activate Urza, Prince of Kroog by paying {1}, 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 {U}.
  7. Repeat from step 5.[END OF COMBO STEPS]

Result:
  - Infinite enters the battlefield
  - Infinite tapped creature tokens[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
[END OF COMBO PREREQUISITES]
assistant