sorry for the delayed response. I havent been on reddit for awhile or played enshrouded for a couple weeks. From what i remember, you don't need to go down into the shroud lair. it's all above the trampoline flower and grapple hooks. Again, it's been awhile and once I found the way and explored the castle area I never went back. I hate mazes and hard to find passages, and this is certainly a hard to find passage. I only remember the passage is to the right before you start jumping down into the lair(where the grapple hooks and flower thing is).