Astral Hypnos is an Enchanter spell.
Astral Hypnos is a status-changing spell that puts the target to sleep for a maximum duration of ten seconds. During this period, the target cannot perform any actions. However, if the target receives any damage during this period, the effect of the spell is cancelled.
Because the cooldown period for Astral Hypnos is only 5 seconds, it's possible for a skilled Enchanter to keep two enemies incapacitated simultaneously by repeatedly recasting the spell on both. Certain equipment can make this spell even more effective, hypothetically allowing a skilled caster to keep even three or four opponents frozen at once.