If you have made your way to the Sorcerous Vault, you arrive at a room that has 3 doors and this is a puzzle that needs to be solved but can be quite annoying.
The door on the left leads to the Elminster Vault while the one on the right leads to the Karus Vault, leaving the one in front of you (Silverhand) the way to open them.
This requires that you head to several sets of doors to find a lever for both the Elminster and Karus Vaults but choosing the right path is required and there are traps to watch out for.
How To Enter The Ramazith Door?
Before you make your way to the room with 3 doors (Elminster, Silverhand, and Karsus), you will need to get past the Ramazith door.
This can be done by using the Sorcerous Sundries Mystery Door Key but you may also open it by using Thieves’ Tools to pick its lock.
The Sorcerous Sundries Mystery Door Key can be found in one of the chests in Ramazith’s Tower, which you can access from the Sorcerous Sundries.
How To Solve the Door Puzzle?
There are two paths that you must take, which include one to open the Elminster door and another one for the Karsus door.
Going through the Silverhand door will allow you to start and from here, the doors that you enter need to be precise to reach the lever at the end.
Each of the rooms will also have traps but these won’t do much as going through a door instantly teleports you to another room.
The following paths may be taken to find the levers at the end.
Unlocking Elminster Door
Head into the Silverhand door and go through the Evocation door to find another door labeled Wish and you will find the lever inside.
Unlocking Karus Door
Start by entering through the Silverhand door and proceed by going through the Abjuration door before you enter a door labeled Silver, which is where another lever can be found.
How To Leave Lever Rooms?
Once you have made your way to a lever room and have interacted with it, this will open one of the two doors in the first area.
You may exit these lever rooms by going through any portal afterward and this is where you will be able to make your way past the doors to get into the vault rooms.
Verdict
Tons of traps can be found in the door rooms, which makes it important to interact directly with the door to avoid getting killed. (There is a lever that disables the traps too or you can go around them)
Both the Elminster and Karsus doors will have their loot as well as an important quest item that will allow you to progress with Unlock The Ancient Tome and The Wizard of Waterdeep quests.
Only by heading through the doors mentioned above will you be able to reach the levers as the rest of the doors will just keep teleporting you back.