Ring of Death
The henchmen nods, and follow behind you. The door is not only unlocked, but also without traps. Inside, you find what seems to be a combination of storage area and kitchen, with just a staircase heading up. The various boxes and chests holds run-of-the-mill supplies for an isolated building in the forest, though you notice a layer of dust suggesting nothing here has been used for a while.
The second floor is similarly left unused, though it does hold more fancy items. Half of the floor is taken by a simple bedroom. The bed is made, and clothes are in the wardrobe, but a layer of dust shows no one used the desk for a while. The clothes seems familiar, kind of like what the necromancer who attacked your inn was wearing.
The other half is a small necromancer's lab, with some valuable components (Worth 20 coins), and some disgusting rotten flesh and broken bones, made only slightly better by the layer of dust covering everything.
Third floor. Another, larger bedroom. This one seems in use, though. The soft bed is unmade, and the room needs a good dusting, but someone was sleeping here in the last few days, at least. But otherwise, there's nothing of note.
As you reach the fourth floor, a quick look outside tells you you're at the last floor. The door, still open and not trapped, leads into a major magical laboratory. The walls are covered with filled bookshelves, maps, scribbled notes in Elven, and a silver mirror. There's also alchemical equipment, but it seems to have been left in disuse for a long time, unlike various divination implement scattered on the tables. More books are tossed on the floor, with a few bowls of half-eaten food. The entire place looks like a mess, as though it's owner was too busy to do any form of cleaning.
The only part of the room that seems sorted is the central table, where an open book sits next to a loosely rolled-up scroll.