Withstand Death

Even if the Necromancer is careful in battle, there comes a time when even that doesn't help and death comes. Since the power of resurrection is not within Lithos' hands, the caster instead can make a pact with him by using Withstand Death, that upon the caster's death he at once rejects the soul, and returns it to the healed body, thus making sure the caster doesn't actually die.

This is a very taxing spell and should only be used as a last resort, when things look really dire. Also, it only works one time.