Beyond Terror (1980)

After a drug-fueled 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 short-lived as they find that the supernatural horror in the catacombs is something further than fear… it is Beyond Terror!