Beyond Terror (1980)

After a drugfueled night of violence a group of young degenerates and their hostages find themselves stranded in a remote abandoned church in rural Spain Their evening of debauchery and blasphemy quickly turns to greed when they discover a local legend that tells of a vast fortune guarded by mummies in the catacombs beneath the ruins Their lust for the treasure is shortlived as they find that the supernatural horror in the catacombs is something further than fear it is Beyond Terror