Buy it, get it from the Hill giants.
It is used to open the muddy chest
open the dragon chest in Taverley
Talk to the banker NPC in-game about your key, should give you the option.
A Dragonstone + 2 Rune Bars
Well if you are talking about the captain, there should be a building NW of the Castle climb the stair case until you reach a Small room. The captain should be in there talk to him (and after a lot of arguing ) you will get the keys!
sorry you cant make keys on runescape unless of corse it is the crystsal key.
There isn't a key for it unfortunately.
A brass key.
Buy it, get it from the Hill giants.
You kill chaos Dwarves there I think, and they drop the key.
It is used to open the muddy chest
open the dragon chest in Taverley
Talk to the banker NPC in-game about your key, should give you the option.
You can buy soft clay on ge, and you can buy a key mold.
Yes, it's called a key-logger.
The same way you got your first key. ( If it's "Elemental Workshop" Quest )