Incantation Magic & Vampiric Attacks - Am I doing this right?

[cltchrn]

Originally Posted by Ghostdancer

Vampiric Blade
Spell Effects: Create Necromancy + Transform Necromancy.
Inherent Modifiers: Damage, Special.
Skill Penalty: Path of Necromancy-2.
Casting Time: 10 Minutes.

This spell causes a weapon, weighing no more than 10 lbs. and doing no more than 4d, to heal its wielder 1HP for each point of damage inflicted. The spell lasts 10 seconds, and while active the weapon glows with a dark, unhealthy aura.

Typical Casting: Create Necromancy (6) + Damage, Direct Damage (12*) + Transform Necromancy (8) + Duration, 10 Seconds (1). 27 SP.

How about a Vampiric spell that affects something other than the living? For example, would a Vampiric Weapon that only transfers HP from demons use Destroy Demonology + Transform Necromancy, or would it require an additional Transform Demonology effect to turn "demon death" into "living life"?