Incanatrix

From DevroWiki

Mages, specialists, and sorcerers that seek to devote themselves to the study of spells and techniques that affect other spells take courses at the Tribunal of Arcane Law and study with other like-minded masters to become one of the Incanatrix, metamagic specialists. These individuals are prized within the mystical ranks of the armies of Callandor and Drakenmoore for their ability to share spells and metamagic effects with surrounding spellcasters, but the restrictive nature of Incanatrix study tends to lessen the interest of many casters before they even begin studies.

This class is not considered open gaming content; it can be found in Player's Guide to Faerun, pg. 61, by Wizards of the Coast.