By retrieving my choker and besting Surena, you've proven that you're at least as capable as she was.
With that said, I can tell you're direly in need of training. You can manage the flows of magic, yes, but being a warlock is much more than that.
I will show you how to command a voidwalker, but before I can, you must call one forth at a summoning circle and subdue it using whatever weapons--physical and magical--you have at your disposal. Use the magic of this choker at the summoning circle below.
