The dagger is capable of slaying any target it hits. The victim must save vs. magic or be destroyed. The bearer also becomes very wise. The ring will allow you to become a most sucessful burgler. Animals and Spriggans take no damage.
Daedric beings take only half damage.
Humanoids take full damage. Undead take double damage. This ring is only useful when you are allowing yourself to be hit, my character usually has a sheild spell on and cannot be hit, so the ring is useless. The rose wilts away when it's power is used to much and will eventually die. A skilled lockpicker may even be able to open some magically locked doors with it.