Encroaching Mycosynth + Grand Architect + Training Grounds + Urza, Prince of Kroog

Mana needed: {4}

WU identity

Commander legal

The 4 combo pieces

How to execute it

  1. Activate Urza by paying {4}, creating a token copy of Training Grounds that is a 1/1 Soldier in addition to its other types.
  2. Activate Grand Architect's second ability by tapping the Training Grounds token, adding {C}{C} that can only be spent to cast artifact spells or to activate abilities of artifacts.
  3. Activate Urza by paying at most {2}, creating a token copy of Training Grounds that is a 1/1 Soldier in addition to its other types.
  4. Activate Grand Architect's second ability by tapping the Training Grounds token, adding {C}{C} that can only be spent to cast artifact spells or to activate abilities of artifacts.
  5. Repeat from step 3.
  6. Once you have infinite colorless mana, you may target any other nonland permanent using Urza's ability.

What the combo produces