Hi all,

I need some help about two feats I found inside this book.

I'm talking about Corrupt Spell feat and Violate Spell feat (both add the Evil descriptor to that spell).

Corrupt spell: if the spell deals damage, half of the damage dealt is unholy damage. For example a corrupted Fire Ball (6d6 total damage) deals 3d6 fire damage and 3d6 unholy damage. So a creature immune fire potentially take 3d6 unholy damage.

Violate spell: if the spell deals damage, half of the damage dealt is vile damage. For example a violated Lighting Bolt (6d6 total damage) deals 3d6 electricity damage and 3d6 electricity vile damage. But a creature immune electricity still does not take damage.

What I do not understand is:

1) what exactly is the Unholy Damage?? Do you know any creature immune or vulnerable to that kind of damage?

2) what exactly is the Vile Damage?? Do you know any creature immune or vulnerable to that kind of damage?

3) why a PG should use/take the Violate Spell feat?
what do you gain with this feat (apart the evil descriptor)? In fact the enemy still take no damage from the spell, if it has that kind of energy immunity. The Corrupt Spell feat is much better!!!

Is there any implication I'm not able to get???

thanks to all!!