Forgotten One

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While a decent amount of information is known about these spirits after they are born, no one really knows how they actually come into existence.
Pale Druids say that they come from a humanoid that wasn't buried properly and then forgotten, thus prompting the spirit to come back in vengeance of being forgotten, seeking out the ones that has forgotten them.
That being said, it seems that these creatures don't go after any specific person ever. They simply seem to roam about an area until something enters its vicinity.
One thing that is true is that it does seem to harbor a lot of hatred towards humanoids. Whether that's from being extremely territorial or hating people that have forgotten it, no one really knows.
It is advise to stay away from these creatures, and because they typically stay in one place forever they are very easy to avoid.