Instant, 1G (2)
Common
Destroy target enchantment. Clash with an opponent. If you win, destroy all enchantments your opponents control. (Each clashing player reveals the top card of his or her library, then puts that card on the top or bottom. A player wins if his or her card had a higher converted mana cost.)
Illus. Michael Sutfin

10/1/2007: If you win the clash, you destroy all enchantments all of your opponents control, not just enchantments controlled by the opponent you clashed with.
Legal in Vintage (Type 1)
Legal in Legacy (Type 1.5)
Legal in Classic (MTGO)
Legal in Commander
Legal in Modern