You start to feel sick, the effect the ysalamiri are having on you are
terrible. Obi-Wan is also feeling sick.
"Who are you?!" You demand to know.
The dark figure laughs. "I am Slavor. Lord of this
castle."
Stright into a trap! There, standing before you is the man that had
chashed you down the corridor before! "But how..?" You
stammer, trying to figure it out. You had felt no one behind the door.
The dark figure points to something behind him, and all at once you
understand. On frames behind him are ysalamiri, creatures that push
back the Force, so that it doesn't exist. So THAT'S why you didn't
feel him!