To get the Superhuman fighting style in Blox Fruits, you need to follow a few steps. First, reach 300 Mastery in four fighting styles: Dark Step, Water Kung Fu, Electro, and Dragon Breath. You can obtain Dark Step, Water Kung Fu, and Electro at Half Cold Half Ice Island. For Dragon Breath, purchase it for 1,500 fragments at a specific location, such as the Cafe inside the bridge.
Next, grind for Mastery by farming NPCs and bosses. This will help you reach 300 Mastery on each of the four fighting styles. Be patient and consistent, as this can take some time.
Once you’ve achieved 300 Mastery in all four fighting styles, head to the Snow Mountain. Find the Martial Arts Master and talk to him. You can then buy Superhuman for 3 million Peli.
Following these steps will enable you to obtain the Superhuman fighting style in Blox Fruits. Enjoy your new abilities and have fun playing!