This looks like an elaborately fashioned wooden egg-cup, but it is a powerful magical tool, used mainly by witches to conjure up spirits and familiars.
The Glow Lights of the Great Library. This set of five unbreakable crystal balls provide bright magikal light so people can read among the rare books and scrolls in the Great Library without risking candles. These innocuous items are often overlooked. They would not be, if anyone knew their origins were with Corvus the Mad.
The Dragon Carved Egg, is a perfect crystal egg, the size of a goose egg, etched with images of a pride of dragons. It grants the one holding it immunity from Dragon. This item is another Legacy of Corvus the Mad. In fact, his signature is written in tiny script in the edtchings.
Bed, health, live, get well.
An Elven artifact with no other purpose but to spread hatred and mayhem.
A small door, often wood but sometimes metal or stone, that is a doorway to an extra-dimensional room.
Grothar’s oxen driking horn has an ornate silver encasement over the bottom half of the horn. The horn will turn saltwater into the finest dwarven ale.
A bronze bowl with warrior carvings around the outside of it. When used correctly it will allow the wielder’s spirit to venture out of thier body and go where it wishes.
On a location with numerous webs, and at least one big spider, there is a something inside a cocoon. It is humanoid in shape, still moving. If the heroes free it (not before they kill or drive away the spiders), they meet a ... zombie!
The poor zombie wandered the dungeon alone, and tried to kill a big living creature (= a spider). The spider used the usual treatment, even if this victim did not look tasty. The zombie can be easily killed as any other zombie. It got but several doses of spider-poison, so can be something worth if it is extracted. You can mention to a druid or ranger the fact the spider had no poison anymore.