Meltdown

Sorcery, XR (1)
Destroy each artifact with converted mana cost X or less.¹
Catastrophes happened so often at the mana rig that the viashino language had a special word to describe them.
Illus. Donato Giancola

Gatherer Card Rulings [Nov 2009]

• 10/4/2004: X can be zero.

Format Legality	Legal in Vintage, Legacy Banned in Extended, Standard, MTGO Classic
Printings (1/6)	Urza's Saga (Uncommon)