Chronomaly

"OOPArt" (先史遺産 Oopātsu) is an archetype of cards used by III in Yu-Gi-Oh! ZEXAL. "OOPA" is an acronym for "out-of-place artifact", which is term used to describe artifacts that make no logical sense give the technology available at the time they were created. Such objects were also featured as part of the "Ancient Treasure" series in the Yu-Gi-Oh! 5D's anime.