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.
Urza, Lord Protector has 2 listed printings; the most valuable is the Prerelease printing from PBRO at US$18.96 on TCGplayer's market price. Prices below are the cheapest in-stock listing in the United States.
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