Chilling Darkness (What does it do)

[Man-thing]

My co-DM found a magic item he wants to include in the game but one of the features of the item is the ability to cast chilling darkness . This spell is not listed in the book and we can't find a description. We think it is in Codex Arcanis but we could be wrong.

The source of the item is Forged in Magic . Anyone know what this spell does?

 

[Kilroy]

There's a version of a demon with that ability listed here:

http://enworld.cyberstreet.com/showthread.php?p=1806743

but I've more often seen it used as a negative energy version of searing light.