Beyond Terror (1980)

In rural Spain, a group of reckless young people and their captives find themselves trapped in an abandoned church after a night of drug use and violence. Unaware of the danger, they discover a local legend about a hidden treasure beneath the ruins, guarded by mummies. Driven by greed, they explore the catacombs to find it, but discover a terrifying otherworldly horror that unleashes itself upon them. Their descent into the depths reveals the true meaning of facing unimaginable terror.