From the Start, a Travel Frog Came to Visit, and I Stewed It into Soup

After spending five years fighting in the Digital World, Su Zhe finds himself stranded on a small island. Just then, a Traveling Frog arrives and offers to trade an Animal-type Devil Fruit for his partner, WarGreymon. Su Zhe stares at the pot beside him, lost in thought. After finishing his frog soup, Su Zhe discovers that WarGreymon has inherited the Traveling Frog's abilities. Well, looks like it's time to meet the Traveling Frog's owner. Before long, postcards start arriving one after another. One Piece: WarGreymon tears through the Four Emperors, takes down the Five Elders, and establishes a country. Demon Slayer: The Demon King is killed by sunlight, and Shinobu Kocho is brought back.