You've heard wild pigs referred to as razorbacks, which implies that their spinal ridges are sharp enough to cut. That idea is taken to the limit in the Swedish legendary creature called Gloson. This supernatural sow is associated with the "year walk," a ritual wherein someone takes a hike as a quest for revelation around the new year. Gloson is huge, with white skin, burning red eyes, and a real razorback with saw blades. Gloson will charge at a person walking, run between their legs, and cut them in half vertically!
Descriptions of Gloson are usually filled with all kinds of horror motifs. One account says: “Gloson was horrible. It had one hundred eyes over its body, shining like vile fire”. Usually, she (remember, it is a sow) is said to be a pig in the form of a horrible sow with a back in the shape of a razor-sharp saw. Sometimes she appears accompanied by several piglets. A common motif in the legends is that Gloson runs at the year walker at full speed, and seeks to come between the year walker’s legs and cleave the walker in two with her razor sharp back. But in some records it is said that she could also carry a year walker far away on her back. How long the ride took varies, roughly from 7 weeks to 3 years, with the result that the rider could become bewildered, insane or even die from exhaustion. Sometimes the motifs are combined so that the one who is carried away on her back will be massacred by the saw during the hard ride.