To access the new armoury area, you'll need to find the key which is hidden in a block on the halls level, and then choose the secret exit after defeating Claudia! The Halls level is the one with the moving statues.
The armoury has been abandoned for centuries and is now home to giant killer spiders! This area enemies can use shield, and there's webs to slow you down. There's a big spider boss also.
Any problems let me know on the forums,
Paul