[As information flooded your mind, you rested for a while to digest all of it.]
[After a few minutes had passed, you finally knew what the other power system was aside from fairy fruits.]
[According to the fairy fruit user who uploaded the knowledge of it into the big white pearl, that power system was called "Leviathan Tempering Path".]
[The Leviathan Tempering Path originated from the mermaid race. They had created this Path due to how rare Fairy Fruits were, and not all mermaids could possess Fairy Fruits, yet they encountered sea monsters more often than humans since they lived deep underwater.]
[The human fairy fruit user who ate the Ability-Type Knowledge Charm Fruit managed to acquire the full training methods of the Leviathan Tempering Path from the mermaid race.]
[According to him, the Leviathan Tempering Path used to be usable only for mermaid physiology. It was only under his refinement and experimentation that humans could now master the Leviathan Tempering Path, even if not as fast and suitable as mermaids.]
[The Leviathan Tempering Path revolved around the concept of the ocean possessing evolutionary energy that allowed sea monsters to grow enormous and become powerful "leviathans".]
[As mermaids have confirmed, sea monsters indeed possessed such evolutionary energy called "Sea Origin Energy".]
[The greater the size and power of a sea monster, the more Sea Origin Energy they possess.]
[The mermaid race created the Leviathan Tempering Path to devour the Sea Origin Energy possessed by sea monsters and leviathans, using that plundered Sea Origin Energy to refine their physical bodies and achieve evolution biased to water body adaptation.]
[That way, even if mermaids didn't eat Fairy Fruits, they could contend and even defeat sea monsters just by relying on their physical bodies strengthened by the Leviathan Tempering Path.]
[Moreover, unlike most power systems, the Leviathan Tempering Path didn't revolve around generating Sea Origin Energy and manipulating it to increase the body's strength.]
[Instead, it lets the devoured Sea Origin temper the physical body and let the pure ocean evolutionary aspect that energy possessed to infuse it into every part of the body, making it have an innate affinity towards the ocean.]
[During the progress, almost all devoured Sea Origin would be consumed, so there's not much Sea Origin left for combat, not that the Leviathan Tempering Path was created for energy combat.]
["The Leviathan Tempering Path, as I have expected, deals with the problem of a weak physical body and reliance on Fairy Fruit ability. Even if I ate a Fairy Fruit, I can still use the Leviathan Tempering Path as it doesn't conflict with the Fairy Fruit power system."]
["While I might possess a Mythical Hybrid-Type Fairy Fruit, it still isn't suited for physical combat. The Leviathan Tempering Path is quite powerful as the Fifth Stage could even fight and defeat sea monsters that are more than one kilometer tall."]
["However, humans training on that path will have higher risks of sea mutation compared to mermaids. After all, humans are land dwellers while mermaids have been living underwater as soon as they were born, making their affinity to Sea Origin Energy higher than humans and closer to sea monsters."]
[Despite the risks, that didn't dissuade you from training on the Leviathan Tempering Path.]
[The Leviathan Tempering Path is divided into five stages, and from weakest to strongest, they were: Tide Tempering, Current Bone Tempering, Abyss Flesh Tempering, Leviathan Frame, and Abyss Sovereign Body.]
[The Tide Tempering Stage, as the first stage, while not that powerful, still allowed humans to possess superhuman physical capabilities as long as they were in water.]
[At the Tide Tempering Stage, the body begins absorbing Sea Origin Energy, allowing the skin, bones, and muscles to become denser. Moreover, they can survive strong currents and pressure longer, with physical strength noticeably increasing near water.]
[At the following stages after that, physical prowess will decline when not near any large bodies of water, and the decline is by one major stage.]
[As for the Tide Tempering Stage, the decline is mostly from possessing superhuman capabilities powerful enough to defeat small sea predators (3-10 meters) in water, to slightly above peak human power while on land.]
[You were aware of the downsides of the Leviathan Tempering Path, but you didn't mind, as having a way to improve your physique was better than having none.]
[On the other hand, the Current Bone Tempering Stage allows fighters to be on par or even defeat 10-30 meter sea monsters.]
[Reaching that second stage allowed one's skeleton to be pressure-resistant, with organs adapting to long-term water exposure. Not only that, blood circulation changes for oxygen efficiency, and being in water even grants minor regenerative capability.]
[It's at the Current Bone Tempering Stage that separates humans from mermaids. It's when the mermaid race considered their kin to be "combat-capable".]
[Moreover, since your Mythical Hybrid-Type Fairy Fruit wasn't specialized in physical power, you realized that your physical power in True Fairy Form was only comparable to a Current Bone Tempering Fighter.]
["At most, if I achieve the Fairy Fruit Awakening Stage, my Fairy King Form will be comparable to the Third Stage of the Leviathan Tempering Path."]
["So, to make it worthwhile, I'll have to reach the Fifth Stage so that in the real world, my strength will only drop to the Fourth Stage due to lack of water in the Zombie Apocalypse World."]