Urza, Prince of Kroog + Mycosynth Lattice + Training Grounds + Crumbling Vestige

Urza, Prince of Kroog

Mycosynth Lattice

Training Grounds

Crumbling Vestige

How it works

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 Urza by paying 2, creating a token copy of Training Grounds that is a 1/1 Soldier in addition to its other types.
3. Activate Urza by paying 1, creating a token copy of Crumbling Vestige that is a 1/1 Soldier in addition to its other types.
4. When the Crumbling Vestige token enters the battlefield, it triggers, adding 1.
5. Repeat from step 3.

This fascinating loop turns Urza, Prince of Kroog into an incredible engine by leaning on the global permanent-altering effect of Mycosynth Lattice, which ensures everything on your board counts as an artifact ready to be copied. Training Grounds steps in to slash the activation cost of Urza's ability down to just two mana, and as you stack those cost-reductions further with multiple token copies of Training Grounds, Urza's activation fee eventually drops to a mere single generic mana. That discount makes it cheap enough to endlessly copy Crumbling Vestige over and over again; because Mycosynth Lattice makes the land an artifact creature, each newly arriving Crumbling Vestige token immediately triggers its own mana-producing ability to fund the next iteration.