Scepters are used by Sorcerers to instantly deal a moderate amount of damage, in a “chain lightning” effect, to a number of enemies. When activated, the closest enemy in a “cone” area of the direction of your cursor will start the chain, this activation area extends to the edge of the screen. You will see a particle effect of this cone if there are no enemies within it. For the chain to extend to more targets, a monster that has not been hit yet must be within ~8 Range of the last target.
At present time, no scepters unique to Nilly's Realm have been released. When this changes, check back here for information.