Using my sixth sense, I scanned the whole fortress and there seemed to be around 5 floors. 2 floors underground where the hostages were kept and 3 floors above ground.
Her mana signature was faint but I could feel it below; whatever they used to sedate her and the other powerful individuals like Miss Elena, I had to be wary of it.
There were about 200ish guards just on the ground floor. Thanks to the S Grade invisibility Cloak I had bought a couple months ago, my presence was completely diminished. I sneaked past several guards whilst they talked and only stopped when I overheard some interesting information.
"Can't believe our boss relocated this far for a mere girl. What a stupid guy, we lost over 80% of our forces cause he was a damn simp." One of the guards mocked.