Urza, Lord Protector [The Brothers' War Prerelease Promos] Human Artificer they cast it without paying

they cast it without paying its mana cost

These devices help me 'tune' that instrument

scientific institutions

The suns of Mirrodin have shone upon perfection only once

Every other player at the table plays cards and argues in order to convince the operator to spare their lives and condemn everyone on the other track to a gruesome death-by-trolley

Urza, Lord Protector [The Brothers' War Prerelease Promos] Human Artificer they cast it without payingSet: The Brothers' War Prerelease Promos Type: Legendary Creature Human Artificer Rarity: Mythic Cost: {1}{W}{U} Artifact, instant, and sorcery spells you cast cost {1} less to cast. {7}: If you both own and control Urza, Lord Protector and an artifact named The Mightstone and Weakstone, exile them, then meld them into Urza, Planeswalker. Activate only as a sorcery.