Should there be some performance drugs in Penumbra?

[Schyzzo]

Why not use some plants or mushrooms that always grown in those places? And more, Phillip could find some notes about than and how to use to improve their performance, like the bomb mix in the epi one. Nothing fancy like Oblivion, of course, something about 2 plants and 3 mushrooms wihch gives or more strengh or more speed or more jump... and, why not, some mix could kill you, or let you dizzy!!