Spellstorm

Gathered together in a merchant's mansion to gain possession of the mythical Lost Spell, a powerful enchantment designed centuries ago by the presumed dead god of spells, archwizards become trapped in a vicious spellstorm as they face down the infamous Elminster of Shadowdale, who claims he's just there to decide who gets the Lost Spell, but who clearly has an agenda of his own. But then the archwizards start dying.