Archaeologists in Germany have discovered a rolled-up piece of lead that they think could be a medieval “curse tablet” that invokes “Beelzebub,” or Satan.

Upon first glance, the researchers thought the “inconspicuous piece of metal” was simply scrap, since it was found at the bottom of a latrine at a construction site in Rostock, a city in northern Germany, according to a translated statement.

However, once they unfurled it, archaeologists realized that the 15th-century artifact contained a cryptic message etched in Gothic minuscule that was barely visible to the naked eye. It read, “sathanas taleke belzebuk hinrik berith.” Researchers deciphered the text as a curse that was directed toward a woman named Taleke and a man named Hinrik (Heinrich) and summoned Beelzebub (another name for Satan) and Berith (a demonic spirit).