The scroll reveals the identity of players under the effects of the Potion of Invisibility and the Scroll of Concealment, similar to the Potion of Perception. It also brightens the colors on the screen. The scroll reads "Luminis".
While you are standing in the bright circle, you gain 2 attack on each hand and 25% fear, deep sleep and light sleep resistance.
A Magic Skill level of 25 is required to use it.