Iron Skin

This is really the detail of this game about Lineage W, I got Iron Skin which is the magic skill of Earth Elf from the in game market for 1500 diamond which is about one thousand new taiwan dollars.

And the info in skill descrition says that it could add ten physicle defence, sounds really good, but after i really have it and running for myself, i found out that is only eight physicle defence, why? Becourse the Magic Arts Level one got a magic which is called Shield could not working at the same time, so i lose two physicle defence of that.