Vodo felt the incoming wave of Force power, but he allowed it to flow over him. It was almost like defelcting a blaster bolt with a lightsaber. Vodo simply redirected the Force push, but nevertheless, he still felt it.
He stumbled back a bit, before regaining his balance. He then reached out with the Force, trying to feel the other. As he suspected, Silus was hiding his Force signiture from him. But what Silus probably did know was that while he hid his Force signature, he also hid a space in the Force.
Vodo expanded his sphere of responsibility, and searched for any holes where he coulf not feel his surroundings.
One spot stood out.
Vodo, almost casually raised his hands and a very large durasteel plate disconnected itself from the side of a nearby building. Guided by the apprentice, the plate rushed toward the place where he had detected the missing spot in the Force.