Transmutation [Evil]
Level: Cleric 4, Sorcerer 4, Wizard 4
Components: V, S
Casting Time: 1 swift action
Range: Personal
Target: You
Duration: 3 rounds or until ended
Inky black energy flows across your body, dripping to the ground and hissing with corruption everywhere if lands.
This spell adds a taint of evil to your magic, granting you special potency against your good-aligned enemies. Your spells gain the evil descriptor. Any spell you cast of 3rd level or lower deals +50% damage to good-aligned creatures.
As part of the casting of this spell, if you are a sorcerer you can sacrifice one sorcerer spell slot of 5th to 9th level; doing this increases the maximum level of spells affected by touch of the blackened soul to the level of the sacrificed slot minus 1. For example, it you spend a 4th-level slot to cast the spell and a 5th-level spell slot to augment it, you would deal extra damage to good-aligned creatures with spells of 4th level or lower.
Special: An evil-aligned caster of the dragonblood subtype can choose to end this spell’s duration by activating protection from good (as the spell, but targeting itself) as a swift action. This effect lasts for the normal duration of protection from good.
Source: Dragon Magic, page 73.