This guide is relevant for Old School Runescape.
Talk to the Gypsy, Aris, who is inside of her tent in the centre of Varrock.
Ask her for your fortune, which will cost 1gp. She will see you fighting an ancient demon called Delrith. She will then go on to tell you about Wally, and how he defeated Delrith. You will see an incantation that he uses; be sure to note it down for later use in the quest.
Gypsy Aris will also tell you that Sir Pyrsin has the Silverlight sword. Go talk to him in Varrock castle.
Sir Pyrsin will tell you that the sword is locked up and you need 3 keys. He has one key, Captain Rovin has another, and the wizard Trailborn has the other.
He will now explain to you that he lost his key down the drain. This is your cue to fetch it for him!
Head outside of the castle's kitchen. You will see a drain there, use your bucket of water to flush the key down into the sewers.
Head down into the sewers and go northwest to find the Rusty Key.
Sir Pyrsin will tell you that he has given one of his keys to Captain Rovin.
Climb to the second floor on the northwest side of the castle and speak to Captain Rovin.
Go through all the dialogue and eventually he will give you his key.
Return to Sir Pyrsin and speak with him again to find out he has given one of the keys to Wizard Trailborn.
Gather 25 bones and head to the Wizard's Tower, which is south of Draynor Village. Talk to Wizard Trailborn and he will do a ritual with the 25 bones. Afterwards. he will hand you his key.
Now that you have all three keys, head back to Sir Pyrsin and he will give you the sword Silverlight.
Warning: do not commence the next step unless you are ready for the battle!
Run south of Varrock to the stone ruins. You will see a cutscene of the Dark Wizards summoning Delrith.
Kill the wizards first, because they will attack you too. After attacking Delrith, he will become weakened. Say the incantation you noted down earlier to finish him.
Congratulations! Quest Complete!
Guide Made by: Power of Five
Corrections submitted by: Rebecca, Strey, Mike H, Zammyskid