Type: Ability
Class/lvl: Magic User 9
To Cast: cast 'knock'
Target: Room
Duration: Instantaneous
Effect: Will unlock all locked doors in a room.
Mana: 20-80 (+4)

'Knock' is an ancient spell used to open locked doors with the wave of the hand and a simple magical phrase.  'Knock' may open some magical doors, but many mages have already created spells to prevent the successful use of a 'knock' spell on their doors.