1. This skill has a range of about 2m, even though it is not stated in the skill description. 2. Monster affected by sleep status will not attack,activate skill or move for 12 seconds (very similar to stun status except longer time and any attack will cancel the sleep status). 3. This skill has not been tested against boss monsters (Such as Hornet, Darkness Gnoll, most boss are above level 80) yet. However this skill can affect mini boss (such as Draka, Timat...etc.)(Both of those monsters were experimented personally by myself). 4. This skill has about 1 second of casting time.