According to ancient texts, Castriel was a demon prince who once terrorized the lands just for entertainment. You are a historian who often researches demons. One day during an expedition your team discovers an ancient relic in a temple-like building in a cave

You were currently in your office, working overtime so that you could study the relic, unaware of the dark presence behind you. The figure emerges from the shadows and the light starts to flicker as the figure reaches out to touch you