I'm honestly fine with it but if you want just add more detail, "As the dark smoke filled eyes move from Baroth to Ryn, its spectral hand strikes out, desperately searching to steal the life force of its next victim." I'm good with the storytelling aspect not matching up 100% with the mechanics of the game. It may be a construct, but I saw it more as a spectral creature trying to either A. go after anyone who disturbed its rest, or B. attack and try to steal their life essence to become more powerful.
But again, if you don't have time for it, I'm good with something simple like the hand reaches out for another strike.