This is an illustration card from the Demon Slayer: Kimetsu no Yaiba - Mugen Train Arc movie's theater-goer bonus. I took it out of the bag once, but I've since stored it in a file in a dark place, so there is no discoloration or damage. ⚠︎ Please note that there is a noticeable stain on the back, as shown in the second image. If you have any questions, please feel free to ask in the comments section. #DemonSlayer#MugenTrainArc