For vampires with access to other damage sources, the real prize here is Atrophy, for one of few if not the only ability that reduces the enemy's Attack and Defense, affecting both sides of the Damage Formula.
Decay[]
Blood Cost 5
Cast On Enemy
Minimum 25 Intelligence, Maximum 60 Humanity required
On touch, causes aggravated damage
Acidic Touch[]
Blood Cost 10
Cast On Enemy
Minimum 35 Intelligence, Maximum 50 Humanity required
Causes aggravated damage on touched target
Atrophy[]
Blood Cost 15
Cast On Enemy
Minimum 50 Intelligence, Maximum 35 Humanity required
On touch, causes aggravated damage, reduces Strength and Dexterity
Turn to Dust[]
Blood Cost 20
Cast On Enemy
Minimum 60 Intelligence, Maximum 25 Humanity required
Causes aggravated damage on touched target