Surge

Surge is a magical disease which can effect anyone naturally born with magic in their blood (such as sorcerers), it is not known to be infectious.

There are no physical symptoms, the effects manifest solely when the effected uses their magic. It usually causes the diseased to lose control of their magic when harnessing it, it is also known to cut off a sorcerer from their supply of magic, and when they try and use their spells, they instead drain their own life force instead of their magic.