Archeologists in Spain have discovered a 5,000-year-old crystal dagger dating all the way back to prehistoric civilizations. Not only is the relic quite rare, but researchers believe its users hoped to access “magical powers” through wielding it, among other uses. In the megalithic tomb of Montelirio tholos, located in southwestern Spain, researchers discovered a treasure trove of artifacts. Within it were 25 crystal arrowheads, a core for making the weapons, and most remarkable, a crystal dagger dating back as far as 3000 BCE. According to My Modern Met, the dagger would’ve taken incredible skill to craft. It isn’t uncommon to find rock crystal such as this in the late prehistoric Iberian sites, but it’s the context of the tomb that sheds light on how the items were used. The excavation itself took three years, from 2007 to 2010, and researchers finally published their findings in 2015. Researchers say the placement …