What if someone isn't really a threat but only annoying? What if the foes aren't really evil? If a non-violent solution is needed to avoid a confrontation, this spell comes in handy. Sleep causes the target, foe or not, to fall asleep on the spot, ending any kind of conflict in a peaceful manner. Note that for affecting whole groups, the Mass Sleep spell is needed.
Blue potions fulfill the same purpose as the spell.
There are moments in the lives of every practitioner of the mystic arts where discretion is truly the better part of valor. Not all foes are truly evil and deserving of annihilation - verily, some are but beasts of the field seeking provender, and are entitled to life as much as you or I. Yet, unchecked these creatures pose as great a threat to one as a score of rabid orcs. It is in such situations that the wise thaumaturge weaves a Sleep spell and leaves his opposition in deep slumber whilst vacating the current location. The Sleep spell is truly a serious enchantment that requires a fair amount of mental energy to cast, but it is not of such import as to leave the Spellcaster breathless or exhausted. To send your foes to a land of slumber, mix a double portion of Spider Silk with some Ginseng and chant “Duerme” as you sprinkle the reagents into the air. Fear not the distance between you and the intended victims, for the binding power of the Spider Silk will enfold them from afar, while the healing Ginseng will gently wrap them in deep sleep.
The first mass effect spell the developing magician learns, In Zu causes the scent of poppies to emanate from the caster in an ever-widening wedge, dropping into a sound of sleep all those touched by it. Only the toughest minds and wills may deny it. Nightshade, gathered when high tide coincides with a moonless midnight, must be mixed with ocean ginseng and spider silk. Moisten with brine and add sand to mix thoroughly. Lay to dry in bright moonlight. Note that this spell is just as effective on friend as foe; aim carefully.