How can you create a combo with Urza, Prince of Kroog, Encroaching Mycosynth, Biomancer's Familiar, Grand Architect?
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[START OF COMBO]This combo can be formed with Urza, Prince of Kroog, Encroaching Mycosynth, Biomancer's Familiar, Grand Architect

Color identity: GWU
Mana cost: {4}
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.[END OF COMBO STEPS]

Result:
  - 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 enters the battlefield
  - Infinite landfall triggers[END OF COMBO RESULT][END OF COMBO]

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