Who could be the main antagonist in a 'harry tony master merchant death fanfic'?

Obviously, Harry and Tony Merchant are the main characters. Harry could be a heroic type, with special abilities or skills. Tony Merchant might be a more complex character, perhaps a bit of a rogue but with a good heart.

One possible plot could be that Harry and Tony are both merchants in a dangerous world. Master is a powerful figure who controls the market. Death starts to target the merchants due to some ancient curse. Harry and Tony must team up, using their skills as merchants to find a way to break the curse and avoid death, while also dealing with Master's underhanded attempts to take over their businesses.

Perhaps an ancient spirit that has been awakened by the imbalance in the life - death cycle due to Harry becoming the Master of Death. This spirit sees Harry as the cause of the chaos and tries to destroy him to restore the balance in a way that is harmful to the wizarding world.

I'm not sure who Tony specifically is in this fanfiction without reading it. It could be an original character created by the author, or perhaps a reimagined version of a known character in a particular fictional universe.

Perhaps it's a story set in a post - apocalyptic world. Harry and Tony Merchant were trying to survive. They got into a conflict with a brutal gang. During the fight, Merchant got fatally injured. Harry then had to carry on with Merchant's unfinished business and seek revenge.

The 'Merchant of Death' concept probably means that Tony is involved in activities related to death in a commercial way. For example, he might be selling things that can cause death, such as weapons or poisons.

It could also be an old and powerful magical creature that has been awakened by some dark magic. This creature sees Harry as a threat to its existence because of his mastery of magic and decides to target him. For instance, a dragon that has been enchanted with dark magic to be more intelligent and malicious.

Perhaps a dark wizard who is jealous of Harry's new power. This wizard could be someone who has long been in the shadows, waiting for the right moment to strike. He might see Harry as a threat to his own plans of taking over the wizarding world.

It could be Voldemort who somehow follows Harry into the Pokemon world. He might try to use the power of Pokemon to regain his strength and take over both the wizarding world and the Pokemon world. His dark magic could corrupt some of the Pokemon, turning them into his minions.

It could be Voldemort who somehow follows Harry into the DC universe and teams up with some of the DC villains like Lex Luthor. Their combined evil intellect and power could pose a great threat to both Harry and the DC heroes.