Target: each creature in the area of effect
Attack: Intelligence vs. Will
Hit: "The target is slowed (save ends)."
First failed saving throw: "The target is unconscious instead of slowed (save ends)."
Heroes of the Fallen Lands removed the sleep keyword from sleep, and added the charm and enchantment keywords. The "Class Compendium: The Arcanist" article in Dragon 401 republished sleep with no further changes.