This is an automatically triggered secondary effect that accompanies the level 65 song Ancient Chaos Chant.
(https://everquest.allakhazam.com/db/spell.html?spell=4971)
The song is quested. (https://everquest.allakhazam.com/db/quest.html?quest=2866) Not sure if it is also research-able.
Unfortunately, ancient spells and songs are not available from the newly expanded PoK library merchant stocks.
Edited, Apr 7th 2012 12:55pm by Epimethius