[ Not ancient history. Bless him for being so generous! Seimei could argue that the old tales of youkai and magic were definitely ancient history, but he's not going to try to convince Bakugo of that. He feels appreciated in a way, acknowledged even if Bakugo doesn't realize he's doing it. ]

You're right. And there's always the possibility that living entities are responsible. Maybe an evil sorcerer? A dragon that captured us?

[ He's definitely not helping their case or making it sound any less stupid, and he's enjoying every minute of it. ]

But if that's the case, they haven't revealed the source of their power yet.