Wow, this sounds intense! The idea of long-extinct monsters resurfacing and attacking, especially around Kaer Morhen, gives me chills. This secret hideout and beast-breeding angle is also super creepy! It makes me think of all the lore surrounding similar mysteries, like the dark side of things found at Fnaf and other tales of animatronics gone wrong. Wonder if the witcher will uncover some similarly disturbing truth. Can't wait to see how it unfolds!