Alter Aeon Online Help

Keywords are:  'mage spell knock'

Spell: knock                    Mana:  15  Int: 21  Wis: 17  Lvl 15 Mage  (28%)
                                (helpful)   Requires: fly
                                Group: Mage force fields

Usage:
cast knock <target>

The 'knock' spell is used to magically unlock doors and other items.  It is
not guaranteed to work, and is not effective against certain types of locks.