Enchantment, 2U (3)
Rare
Whenever a player casts a creature spell, that player sacrifices a permanent unless he or she pays {1}.
"Creatures fade in and out of existence. It's an unfortunate side effect. The losses are tolerable."
—Belbe
Illus. David Martin
Legal in Vintage (Type 1)
Legal in Legacy (Type 1.5)
Legal in Commander