There is an old manor buried deep within a virulent blue-purple mushroom forest. The decay creeps up all over the walls as a team of three wearing all-covering outfits carefully explores it, trying to avoid the worst of the spore clouds and exploring the structure. The bones are solid and well built, despite what is likely almost a century of neglect and overgrowth. Some of the inner rooms are even still mostly free of fungus. And one of those inner rooms is a sort of laboratory or study, the paraphernalia of academic work scattered around. There are chalk diagrams on the blackboards, on the walls, and eventually, all over the floors too. Glass jars, metal trays, notes on the toxic spores growing increasingly guilty and desperate...

And there's a set of bones in the corner.

...They carefully bundle those up and take them outside, digging a hole and burying this poor soul. After that, a careful inventory of the laboratory for any information that might be useful. It's not new. They gather up what they can recover and prepare to leave- Two scrolls are intact, still shimmering with magic and having resisted the march of time.

On the way out, one of them notices that one of the circular diagrams on the floor is incomplete. On a whim, feeling some urge to 'complete' the forgotten alchemist's work in however petty a way, they take up the nearest piece of chalk and finish the circle.