EvilCorruption

Elara, a young woman who succumbs to darkness and evil powers, transforms into a demoness and corrupts the innocent Seraphina, making her the queen of hell. As their power grows, they overthrow the ruler of the underworld to become the most fearsome demons in existence. When the ambitious sorcerer Caelum offers Elara an artifact to increase her power, she plots to absorb Seraphina's power and further solidify her rule over the infernal realm.

A female student group gets trapped in a secret chamber together with their male guide. They stumble upon an ancient book laying on an altar that is placed in front of a powerful looking throne. When one of the students reads the latin text their guide undergoes an evil transformation.