This key is used to open the doors to go further through the dungeon in Demonheim.
The dungeon area under the observatory has a goblin kitchen with a goblin guard in front of the door. The stove in the room is using the lens as a cooking pot for their food. A chest in the dungeon has the key to the kitchen kill the goblin guard and use the key on the door.
Only a phoenix gang recruit or member can have the Phoenix gang key, they get given it by the door guard.
the security guard in the security room gives it to you
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!
If you are talking about the bit the leads into the Dragons area, you will need a dusty Key, one of these can be obtained by going to the Room Full of Black Knights then On the East side of this room is a Jail Cell. To enter you must kill the guard outside, take the key he drops and use it with the door. Once inside you can talk to the Explorer who is locked inside and get the Dusty Key.
You cant.
It is used to access the windowed room in the Black Arm Gang's hideout in Brimhaven.
sorry you cant make keys on runescape unless of corse it is the crystsal key.
The grimy key is used in the 'Ernest the Chicken' quest. It is specifically used to enter the small room behind the stairs in Draynor Manor to obtain the 'rubber tube'. Note that a level 22 skeleton also resides in the room.
when you go in go past the moss giants and into the black knights hideout to the left of it there's a jail, kill the guard and he should drop a key, (THIS IS NOT THE KEY YOU NEED). Use the key to get in the right hand jail cell and talk to the guy for a key named Dusty Key.
There isn't a key for it unfortunately.
The song Change of the Guard is in the key of D-Flat Major.