Complex sentence: Luffy yells for his friends and Baron laughs bitterly and tells Luffy to look at him, as the happyface flower on Baron's shoulder mutates into a corpulus mess of stem, attached to the Baron's back and shoulders with a head similar to a piranna plant.
Split into simpler sentences: Luffy yells for his friends and Baron laughs bitterly and tells Luffy to look at him. As Luffy watches in horror, the happyface flower on Baron's shoulder mutates into a corpulus mess of stem attached to Baron's back and shoulders with a head similar to a piranna plant.