me again...
I am a little bit further and can see the power gem. It resides in a zombie infested large pit without any ladders. It's like "The Walking Dead". Is there some tricky way to kill those undead? If I go down I get cornered instantly and torn to pieces. I tried going down next to a lever, this one does open a grate to a teleporter. But I cannot get there... too many zombies.
Do I miss something or is it about brute force?