Archsage

Arcsages were weilders of Anima magic with extremely high skill. Fire Sages, Thunder Sages and Wind Sages would all promote to Arcsages, and, as a result, Arcsages could weild all three types of Anima magic with formidable skill.

Possible Arcsages in Radiant Dawn
-Illyana, upon promoting to Thunder Sage, could then promote to Arcsage.

-Tormod could promote from Fire Sage to Arcsage.

-Soren could promote from Wind Sage to Arcsage.

-Calill could promote from Fire Sage to Arcsage.

-Bastian joins you as an Arcsage.