There is a creature in the Baltics, that use to seek havoc on any who crosses it. This gaunt and ravenous creature is the amalgamation of a beastly steed attached to the upper torso of a vaguely human like being. 

Eyes wide and vacant, mouth snarled and skin harsh; this massive creature targets and hunts down it's victims by scent. Once it beings to narrow in on a human, it will never stop until has consumed them- no one can run from it for that reason.

When this creature catches up, it will consume the entire human until there is nothing remaining, not even bone.

The creature originates from the sea and is generally a demon of complete malice. There is only one being that can contain it, but only temporarily.

Otherwise, there is no hope to escape it's grasp. 

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I have described a creature of Norse Myth, hopefully well enough. I want you to guess what it is before I upload a picture I drew of it with it's name.

Sorry if I got some of it wrong.