For sixpenceee

Not the best artist/writer for this but…

Not sure what to call it but it is a beast that will appear in the corner of your eyes and disguise itself into something familiar to you as a way to grab attention.
Once spotted it will often disappear causing some to go searching for it. If found and followed things starts getting weird, colors will appear everywhere hypnotizing you, forcing you to follow it.
If captured as such, it will then lead you to unfamiliar areas and/or to your death, where it leads is random and usually lead to dangerous areas in forests or deserts before disappearing entirely.
Most who have followed it died within the woods and deserts that it leads to, the ones who did survive have come to tell the tale of this horrible creature.