[@Bishop]
The experiments are mostly fine, but keep in mind what he'd be able to accomplish over a seven day period and given what has already been described about the cave. He couldn't do experiments with fire because the only source of fire is the goblins' bonfire, and that'd be far too dangerous for him to go near right now. His Lesser Force is also nowhere near powerful enough to use "high pressure zones" or anything like that.

I would like you to basically remove the encounters with other creatures though, because of what I said before about random encounters.