Soul Jar

Soul Jar
Spell Class:	Regular
College:	Necromantic
Duration:	Permanent
Base Cost:	8
Time to cast:	1 minute
Prerequisites:	Magery 1, 6 Necromantic spells including Steal Vitality
Prerequisite Count:	0
Enchanted Item:	None (see spell description)
Book-Page Reference:	GURPS Magic pg

http://forums.sjgames.com/showthread.php?t=45669 has a good discussion on how to live in one