Witch Coare.  The magical substance possessed from birth that distinguishes witch from mortal.  No two witches are born with the same amount.  Once Coare is used, it is gone forever.  The only way a witch can  regain his or her Coare is through a gift from another witch... or by taking it.

 Axel was an unusually talented witch at birth, and the dark potency of his power tempted him to callously  flaunt it at the expense of mortals .  He killed them casually for sport or at the slightest provocation.

Yet even a witch of his strength came at last to the end of his Coare.  With little more magic than a mortal himself, he saw his previous actions with changed eyes and repented.
 
Now he is bound for the Witch City to stand against his former friends.  Only by destroying those who still prey upon humanity can he be free of the guilt of his own sins.