You see a stone coffin.
Location
Green Claw Swamp, Dark Pyramid, Deeper Catacombs, Drefia, Vengoth Castle.
Notes
Somebody is buried in it. Perhaps you can find something useful in it.
Unlike the Stone Coffin, this coffin does not open upon using it and does not have volume.
Such coffins are part of the Key 5000 quest, Medusa Shield Quest, Stealth Ring Quest, Koshei the Deathless Quest and the Blood Brothers Quest.