No two accounts of an Entropy-Seeker agree on its shape, which suggests that it has very little of one. Most describe a slow, smoky greyness about the size of a man, thicker at the centre and fraying at the edges, that drifts rather than walks, and is easier to see from the corner of the eye than straight on. Where one hangs, colours seem to go duller still and sounds die even faster than elsewhere in the plane. They make no sound of their own. Those who have stood near one describe the smell of cold ash and a heaviness in the limbs.

They are found across the Ashen Wastes, never in numbers, and never where things are thriving. They gather at the edges of failing fires, at carcasses still cooling, at Ash-Walker camps when the stored heat runs low, and wherever an ash storm has passed.

An Entropy-Seeker does not hunt. It waits beside whatever is ending and seems to take something from the ending itself, the last of a warmth or a motion as it goes out. It moves away from anything strong and vigorous, and closer to anything that is weakening. Whether it thinks is not known; it has never answered anyone.

Where one waits, things run down faster: a fire burns lower, a cooling body cools sooner, a tired traveller grows more tired. It cannot put out a strong fire or drain a strong body; it only hastens what is already failing.

They give nothing anyone has found a use for. Their danger is to the weak and the exhausted, and to anyone who lets a fire sink low with one nearby.

The Ash-Walkers are said to read an Entropy-Seeker at the edge of a camp as a sign that their hoard is too low, and to spend heat to drive it off, which is the one waste they allow. Travellers' tales call them the death-watchers of the Wastes and say they come for the dying, which is close to what is seen; whether they cause the dying or only attend it is argued and not known.