>Ability to manipulate Ether Lumps.
In canon, Ether Lumps are useless, made by novices who fail to materialize the other elements. The only implied thing is that they are connected to the 1st true magic in some way.
Saying he can manipulate something defined as "Nothingness" is a little hard to swallow.
For example, he could probably defeat a normal vampire mook, but he wouldn't stand a chance against someone like Forest.
How can he? Most vampires have above human capability along with other traits. If you want to give him someone he can beat say he can beat just about any normal human as most, he can still be picked up and thrown into a wall and go splat by something powerful enough.