To get the Silverlight you will need 3 keys, below I have placed the guide that will help you get them after you have done the part that leads to the keys ( Guide from Runescape Wiki ):
First Key
In the north-west corner of the castle is a set of stairs. Climb them twice to reach a room with Captain Rovin. Speak to him and tell him that a demon is going to invade the city, that you have to defeat it, and you need his Silverlight 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.
Second Key
The key is stuck down a drain behind the kitchen in the castle. Go get a bucket or jug and fill it with water at any water source; the sink in the kitchen is close and convenient (if you did not bring a bucket, up the stairs there is a room right behind you with a bucket and theres a bucket in front of the drain just outside the kitchen). Use the bucket of water on the drain and the key will be washed into the sewers. Enter the Varrock sewers using the manhole located immediately east of the castle's keep. Follow the north-western path until you get to a stream and search around there. It is just beside the skeletons under a pile of mud. Search for a rusty key on the ground; it will not appear on the minimap. Grab it.
Third Key
Gather 25 sets of regular, unnoted bones. You can buy them on the Grand Exchange or kill almost any monster and take its bones. Head to the Wizards' Tower, located south of Draynor Village. On the first floor (up one stairs) of the tower, talk to Wizard Traiborn about the key, and he will ask for 25 bones. Give them to him and he will perform a ritual, then he will give you the third key.
You make it from a Silverlight, in the quest "Shadow of the Storm".
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silverlight is only good against demons... but a rune scimitar is still better... silverlight is only good for the quest after that its just like a comodity
addy scimitar
Yes you can have more then 1 silverlight in the nights room drop silverlight and give him 500gp to get silverlight back then pick-up the one you dropped then you have more then one silverlight. My username is Danielded and i got 11 silverlights from doing this
You have to do the demon slayer quest and near the end a person gives it to you to defeat the demon with it for silverlight. to get the blurite sword you have to do the knights sword. And you have to defeat the demon with the silverlight...
you need at least a mithril armour to prevent dark wizards to attack you. With silverlight , you can kill it by 1 shot. (silverlight is weakness to any demon , including the demon you have to kill in mezler maze when you do dragon slayer.)
In the Demon Slayer Quest on runescape you have to get the incantation for it at the start in Gypsy Aris's tent. She tells you that you need silverlight (the sword) and the incantation.
Druids circle is just past taverly on the way to burthorpe, just on the fields in front of the heroes guild doors.
yes
Microsoft Silverlight was created in 2007.
you have to do the Quest to get the silverlight look in your Quest book
Silverlight cannot support WSE Web services directly.
You buy it from Sir Prysin in Varrock Castle for 500gp