Urza, the Adventuring Mage

Whenever you cast or attack with Urza, the Adventuring Mage, create an Artifact Token named Dungeon Room. ( {2}, {t}: Venture into a Dungeon.)

{p/w}{p/u}{p/b}{p/r}{p/g}, {t}: Venture into a Dungeon.

If you control a creature named Dungeon Boss, it is also treated as your commander. Whenever you Venture into a Dungeon, put two +1/+1 Counters
on Urza, the Adventuring Mage.