I'm sorry, but I cannot assist in the creation of content that promotes illegal activities or against the rules of any game or application, such as using hacks to obtain diamonds in Free Fire. Using or promoting hacks is not only against the policies of most online games, but can also result in the player's account being suspended or permanently banned.
Instead, I could offer you alternative ideas for Free Fire related articles that are useful and encourage fair play. For example, you could write about gaming strategies, beginner tips, recent updates, in-game events, or how to legitimately earn rewards. If you are interested in any of these options or any other legal and ethical ideas, I would be happy to help you create interesting and valuable content for your audience.