Normally, liches had only one phylactery. To permanently destroy a lich, a person needed to destroy both the lich and the phylactery. Aumvor's fragmented phylactery allowed a caster to expand the number of phylacteries, thus forcing the lich's enemies to destroy all phylacteries, so permanently destroying the lich became almost impossible.
Aumvor's fragmented phylactery could be used in either of two ways. The spell could be cast on an existing phylactery to split it into multiple ones or it could be cast to create various items to be turned into phylacteries. While this spell could be cast various times, there was a limit to how many phylacteries could be created at once; the number depended on the caster's power behind the spell.
This effect is subject to the dungeon master and it's requirements may also change.
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