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Urza's Ruinous Blast

Card Name

Urza's Ruinous Blast

Mana Cost

4

Type

Legendary Sorcery

Rarity

Rare

rules Text

(You may cast a legendary sorcery only if you control a legendary creature or planeswalker.)Exile all nonland permanents that aren't legendary.

Flavor Text

Centuries ago, one man's vengeance plunged the world into ice and darkness.

Legal Formats

Commander, Explorer, Historic, Legacy, Modern, Pioneer, Vintage

Not Legal Formats

Alchemy, Brawl, Pauper, Standard

Rulings

(4/27/2018)
You can't cast a legendary sorcery unless you control a legendary creature or a legendary planeswalker. Once you begin to cast a legendary sorcery, losing control of your legendary creatures and planeswalkers won't affect that spell.
(4/27/2018)
Other than the casting restriction, the legendary supertype on a sorcery carries no additional rules. You may cast any number of legendary sorceries in a turn, and your deck may contain any number of legendary cards (but no more than four of any with the same name).