undead beings whose bodies start to decompose after a while, so they need their necromancers to regularly knit their bodies back together using magic.
unfortunately, that means undead beings under the power of cruel necromancers cannot escape. after all, they wouldn't last long without their necromancer's magic to heal them before their bodies start to decay and crumble. and that's not even mentioning the fact that many necromancers having a complete control over their thralls' bodies and sometimes even minds.
there is another option, however... rumor has it that by drinking the blood or eating the flesh of a necromancer, an undead being can gain their magic and use it to free themselves and heal their own body.







