Urza, Prince of Kroog | Mycosynth Lattice | Training Grounds

(and one other card)

Activate
Urza, Prince of Kroog by paying ({4} magic symbol) , creating a token copy of
Training Grounds that is a 1/1 Soldier in addition to its other types.
Activate
Urza, Lord High Artificer's first ability by tapping the
Training Grounds token, adding ({U} magic symbol) .
Activate
Urza, Prince of Kroog by paying ({2} magic symbol) , creating a token copy of
Training Grounds that is a 1/1 Soldier in addition to its other types.
Activate
Urza, Lord High Artificer's first ability by tapping the
Training Grounds token, adding ({U} magic symbol) .
Activate
Urza, Prince of Kroog by paying ({1} magic symbol) , creating a token copy of
Training Grounds that is a 1/1 Soldier in addition to its other types.
Activate
Urza, Lord High Artificer's first ability by tapping the
Training Grounds token, adding ({U} magic symbol) .
Repeat from step 5.