Delrith is a demon of unknown origin resembling a Lesser demon in appearance. He is encountered by players during the Demon Slayer quest. Delrith was once summoned in ancient times by a cult of monks. Immediately after being summoned he was confronted by Wally, an ancient knight of sorts, and quickly defeated with the powerful weapon known as Silverlight and an incantation. For unknown reasons the cult of Zamorakian Dark wizards at the south entrance of Varrock are performing the ritual to summon Delrith into this world again.
Delrith is relatively easy to kill and players can evade the wizards if they take their time. Low-levelled players should exercise caution however as the wizards will deal significant damage against them.