C3272 Brothers' War
He obviously knew of the method before, but he kept quiet afterwards. It was clear that he wasn't willing to use that method.
And what Long Chen could imagine, was that the only thing that the Kitten was unwilling to do, was the Reincarnation Saint Fruit.
When Long Chen talked about Reincarnation Saint Fruit, it turned silent, but he still stayed in front of the Reincarnation Saint Fruit