I, Ace the Seraphim, Slaughter Akainu at Marineford!

[Pirates + System + wish fulfillment] [If you hate Akainu, don't read] Ace transmigrates to the world of pirates. He becomes a Seraphim clone of Fire Fist Ace. He obtains the [Defy Fate] System! By changing someone's destiny, he can earn a corresponding reward! As it happens, Blackbeard defeats Fire Fist Ace and sends him to the great prison. In seven days, Ace will be publicly executed! So... [Congratulations on changing Bon Clay's predetermined fate! Reward: Purple Flames!] Is this the supreme flame? Its maximum temperature can exceed 80,000 degrees, dozens of times hotter than magma! [Congratulations on changing Empress Hancock's predetermined fate! Reward: Conqueror's Haki Infusion! A friendly reminder: the effect is even better when two Conqueror's Haki infusions intertwine!] System, are you sure this “intertwining” is appropriate? [Congratulations on changing Blackbeard's predetermined fate! Reward: Immunity to Devil Fruit Powers!] The Paramount War. Ace knocks Aokiji back with one arm and handles Kizaru with ease! He steps on Akainu's head and humiliates him in front of everyone. Akainu glares furiously and tries to get up, but Ace keeps him pinned underfoot and finally punches straight through his chest! The whole world is stunned! Akainu: Impossible! How can your flames counter my Magma-Magma Fruit! Blackbeard: My Black Hole is useless against you! Stop hitting me! Captain Ace, I'm sorry! Whitebeard: Roger, is this what your lineage factor can do? What a monster! Fire Fist Ace: Vegapunk! What did you do to me? Did you drain all my talent? Vegapunk: This is unquestionably my greatest creation! No, it didn't come from me! He is God's creation! Ace: God? That thing isn't worthy of tying my shoes!