As its name suggests, it makes creatures within a certain area fall asleep. Those affected by this spell will stay asleep for about half a day, even if a dragon roars or a banshee screams nearby. This spell is not taught at Sorcerer's Guilds because it can be used for criminal activities; it must be constructed by the would be caster.
(Article taken from Slayers Universe.)
ware nanji ni ansoku wo atae
hitotoki no yume ni izanawan
- ↑ Encyclopedia Slayers, pag. 224