probably scales with level?
It's 280 nature damage. + 75% of your attack power. So if you had 50k Attack power.Occasionaly you would deal 37,500 + 280 nature damage. I am unsure if this can Crit, and if it has a ICD (Interal Cooldown).
I wonder if the 500 gems and these meta gems still have a use in later patches? will there be sha weapons in 5.3 else it seems kinda useless. If anyone knows something plz reply this comment :D
I believe the hotfix (january 2013) on the sigil drops isn't implemented in this excellent guide. As far as I can tell they removed the sigil of power drops from ToES.
Being a caster dps i'm working on getting the staff also. I have the sword already.
I don't see this mentioned anywhere, but the "A Test of Valor" quest for the 5.1 questline has been changed from 6000 valor to 3000. Still too much time, I'd say.