Destroying the dungeon is the only way to get rid of daji. He can drop him if he wants to, but he won't be able to leave the dungeon when it's destroyed. A powerful intervention is about to happen, and daji is going to disappear. He's going to be immortal, and those who don't die in the afterlife will be immortal gods, too. That's right, daji has stopped perishing. It's been a hundred years since they first met, and now they're back together. They've been separated for a long time, but now they can get back together forever.