The place where they were holding the hostages was right in the construction site behind the cursed beasts, so Klaus simply went around it and came up behind it.
After finding a blind spot on the third cursed beast, he slipped inside and hid for a moment, not making a sound to wait for the beast to leave.
'These beasts are quite powerful but don't have a developed sense of smell. I guess it's because they're humanoid beasts.' He thought.
The beast gradually moved away. It was monitoring as it ate, so it had amazing intelligence. Still, Klaus didn't care.
He turned around and quickly walked deeper into the construction, crossing some small, lonely and small rooms until he reached the main hall.
'It's as I thought. This construction is hollow inside.'
As he ran through the corridors and approached the spot in the center of the room, voices reached him, and soon he could see who was speaking.