Silverlight key is one of the three keys needed to open the three locks of the sealed box which contains the sword Silverlight, a crucial item in the quest Demon Slayer. It is acquired from Captain Rovin after the player has started the quest and has asked Sir Prysin for the location of the keys. This key is the easiest of the three to acquire. Captain Rovin is on the topmost tower on the west side of the castle. Choose the correct phases to say, then Captain Rovin will give the key. Select the option that says "Sir Prysin said you would give me the key" and then select the option that says "Then why did he give you the key?" After bringing up Sir Prysin's clumsiness he will hand it to you. It will take some arguing, though.