Necromancer Enchantment: Last Breath

.. or something like that; Last Breath is simply a suggested name.

Not really sure on cost reqs, other than it would be a constant enchantment, so it'd have the -1 pip.

When a monster dies, necro gains X amount of life.

Spells to make creatures explode on death, the necromancer gains energy on monster deaths, and you can use spells to gain health directly from a creature's corpse or exploit it in another way. Not sure as though it would be a useful addition, more of just a way for slow necromancers to gain health.