Myling

Mylings are an undead being found in Scandinavian folklore, where they are believed to be the phantasmal incarnations of the souls of unbaptized children that had been forced to roam the earth until they could persuade someone (or otherwise cause enough of a ruckus to make their wishes known) to bury them properly.

Lore
The Myling (also known as "utburd") is said to chase lone wanderers at night and jump on their backs, demanding to be carried to the graveyard, so they can rest in hallowed ground. Mylings are thought enormous and apparently grow heavier as they near the graveyard, to the point where any person carrying one (or more) could sink into the soil. If one should prove unable to make it into the cemetery, the myling kills its victim in rage.