Mimic

The Living Inanimate
If an item is left on it's on for long enough, in the right environment (damp, warm but not too warm, the same sort of environment that promotes mold), then it will grow in a strange sort of living-object.

Usually they've got a good amount of organic material. Wool, wood and similar.

A mimic needs to start out as a mundane object that is exposed to human presence frequently, and then suddenly abandoned. If left unchecked, it becomes spite-filled and is no better than a feral animal, but if you reintroduce to distanced interaction, it can be placated without losing its animation. Over a few months, it can become acclimated to more or less constant exposure.

Chest mimics, floor mimics, ceiling mimics, door mimics, bed mimics.