Urza's Ruinous Blast
rarePLST #DMC-107
(You may cast a legendary sorcery only if you control a legendary creature or planeswalker.)
Exile all nonland permanents that aren't legendary.
Centuries ago, one man's vengeance plunged the world into ice and darkness.
🖌 Slawomir ManiakEDHREC #1,612
