Enchantment, B (1)
Uncommon
When an opponent has 10 or less life, if Lurking Jackals is an enchantment, it becomes a 3/2 Hound creature.
Often it's not the hunter or the hunted but the opportunist who thrives in Rath.
Illus. Greg Staples

10/4/2004: Once it becomes a creature, it will not change back into an enchantment if your opponent's life total goes back above 10.
10/4/2004: Once it becomes a creature, it is no longer an enchantment.
8/1/2008: A noncreature permanent that turns into a creature is subject to the "summoning sickness" rule: It can only attack, and its {T} abilities can only be activated, if its controller has continuously controlled that permanent since the beginning of his or her most recent turn.
Legal in Vintage (Type 1)
Legal in Legacy (Type 1.5)
Legal in Classic (MTGO)
Legal in Commander