watch 02:35 The Loop (Games) Do you like this video? Youkai (妖戒; Youkai) is a family in the Battle Spirits trading card game. It premiered in BS31. It is exclusively yellow. Youkai cards are based off creatures and sprites from Japanese folklore. Also See List of Youkai Retrieved from "https://battle-spirits.fandom.com/wiki/Youkai?oldid=127818" Categories: Family Community content is available under CC-BY-SA unless otherwise noted.