Darklight

Darklight is created in the Quest Shadow of the Storm with the sword silverlight, which can be bought from sir Prysin Iin Varrock castle for 500gp after the quest Demon Slayer. In the shaow of the storm quest silverlight becomes darklight aftter you dye it with Black Mushroom ink and used to destory the demon Agrith-Naar.

Against Demons and Vampires this sword hits nearly as well as a Dragon longsword, similar to Silverlight.

The Darklight's special attack "Weaken", drains the opponents Attack, Strength , and Defence depending by the ammount of damage dealt.