Urza, Prince of Kroog + Encroaching Mycosynth + Biomancer's Familiar + Grand Architect

Urza, Prince of Kroog

Encroaching Mycosynth

Biomancer's Familiar

Grand Architect

How it works

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 CC 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 CC 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.

This loop transforms your entire board into a boundless engine of creation, resting on the foundation of Encroaching Mycosynth which turns every nonland permanent you control into an artifact. With Urza, Prince of Kroog ready to replicate your artifacts, Biomancer's Familiar steps in to reduce Urza's activated ability cost down to a manageable two mana. Grand Architect then provides the fuel by tapping your newly minted artifact creature copies of Biomancer's Familiar to generate the exact colorless mana needed to keep the cycle going. Once you've spun this infinite loop to produce unlimited mana and endless copies of your permanents, Urza can pivot that exact same mechanism to duplicate any other artifact you desire.