Grand Architect + Urza, Prince of Kroog Combos

4 known combos featuring both cards in Commander

Infinite colorless mana that can only be spent to activate abilities of artifacts Infinite colorless mana that can only be spent to cast artifact spells Infinite creature tokens Infinite ETB Infinite copies of permanents you control

Combo 1 with Encroaching Mycosynth + Training Grounds

Results: Infinite colorless mana that can only be spent to activate abilities of artifacts · Infinite colorless mana that can only be spent to cast artifact spells · Infinite copies of nonland permanents you control · Infinite creature tokens · Infinite ETB
Steps
  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.

Combo 2 with Mycosynth Lattice + Training Grounds

Results: Infinite colorless mana that can only be spent to activate abilities of artifacts · Infinite colorless mana that can only be spent to cast artifact spells · Infinite copies of permanents you control · Infinite creature tokens · Infinite ETB · Infinite landfall triggers
Show steps
  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 permanent using Urza's ability.

Combo 3 with Encroaching Mycosynth + Biomancer's Familiar

Results: Infinite colorless mana that can only be spent to activate abilities of artifacts · Infinite colorless mana that can only be spent to cast artifact spells · Infinite copies of permanents you control · Infinite creature tokens · Infinite ETB · Infinite landfall triggers
Show steps
  1. Activate Urza by paying {4}, creating a token copy of Biomancer's Familiar that is a 1/1 Soldier in addition to its other types.
  2. Activate Grand Architect's second ability by tapping the Biomancer's Familiar 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 Biomancer's Familiar that is a 1/1 Soldier in addition to its other types.
  4. Activate Grand Architect's second ability by tapping the Biomancer's Familiar 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 permanent using Urza's ability.

Combo 4 with Mycosynth Lattice + Biomancer's Familiar

Results: Infinite colorless mana that can only be spent to activate abilities of artifacts · Infinite colorless mana that can only be spent to cast artifact spells · Infinite copies of permanents you control · Infinite creature tokens · Infinite ETB · Infinite landfall triggers
Show steps
  1. Activate Urza by paying {4}, creating a token copy of Biomancer's Familiar that is a 1/1 Soldier in addition to its other types.
  2. Activate Grand Architect's second ability by tapping the Biomancer's Familiar 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 Biomancer's Familiar that is a 1/1 Soldier in addition to its other types.
  4. Activate Grand Architect's second ability by tapping the Biomancer's Familiar 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 permanent using Urza's ability.
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