Blood Mage

Summery
Blood Mages are a blood elven type of mage adept in fire magic. Generally these casters serve on the back lines where they are able to channel their powerful spells uninterrupted.

Origin
After the fall of Quel'Thalas, many once high elves gave into their bitterness and hatred, turning to the dark sides of their magics. They sought to expand their magical powers regardless of previous morals and traditions, resulting in what many fear to be demonic magic.

Verdant Spheres
Blood Magi are characterized by their verdant spheres. These orbs of magical green fire hover around the caster's body and head the same way soul shards would with a warlock. They are created by drawing the essence of a fel corrupted or undead being into a sphere and their power is re-charged by continued consumption of essence. They are sought after by blood mages for their ability to enhance spells. Any fire spell cast by the owner of verdant spheres has a widened range, increasing the area of the spell's damage.