The collective mind of humanity has power.
The users of magic know they can take on 'idols' into themselves to grant themselves abilities.
A idol of Zeus or Thor grants one the power of lightning or other abilities depending on what part the idol is concentrated on.
However newer Idols can be made, A idol of the invisible man grants one the power of invisibility.
The idol of Dracula makes one a creature of the night.
Doesn't have to be real to have power.
>>54328572
Can I use the power of this idol?
>>54329034
yes, you can spend a full-round action to useless hag.