Made an account just to contribute here. ^_^

At level 13, I mixed a Void Essence with a metal shield, and it gave me +15% Tenebrium Resistance.

I was really surprised at this, since I was going for the Sneaking bonus you get from adding a Void Essence to any apparel.
(Didn't work with my boots, by the way.)



Made at Crafting Level 5.
I'm told "Not enough Crafting" at CR2, so I'm not sure of the Crafting requirement.