[It's a leap of intuition that leaves Russell behind, and he's baffled. All his thoughts have been necromancer, like maybe this guy had somehow reanimated his brother's dead remains, or something. The idea there might have been two 'living' skeletons, moving around...]

That leaves the question of... how they were moving, at all! It just looked like bones.

[No skin, no hair, no muscles. Nothing holding the bones together, as they moved.]

And... a bit of light, in the eyesockets. Glowing with... magic, maybe.