Young Woman Stalked in Campus Library by Old Devil Woman

by Emma
(Newcastle)

Can you help me remember the name of this film?

A young woman is found by students in the roots of an oak tree under an old house. They take her back to campus, not realizing an old woman devil-like creature is stalking the woman in order to survive (they are connected somehow).

In the end, the young woman is dressed in a white nightgown and is being chased around the library campus by the creature.

Please help me find the name of the film!