My Tree Grows Devil Fruits and OP Powers

A dying soul transmigrates into a fragile body, thrust into a dangerous world on the brink of a demonic invasion. He's a useless first-order mage, surrounded by formidable Grand Wizards, Glorious Knights, and terrifying beasts, his fate sealed: a slow, agonizing death. But then, he awakens to a shocking truth: his new soul is intertwined with the very essence of Whitebeard, the legendary \"Strongest Man in the World.\" A mysterious System has manifested, allowing him to cultivate a unique \"Devil Fruit Tree\" that grows impossible powers – from the Gura Gura no Mi's world-shaking quakes to the Pika Pika no Mi's light-speed attacks. As the demonic tide recovers and forgotten gods prepare their return, can even Whitebeard's legacy and a limitless supply of Devil Fruits stand against the heavens themselves? Or will his terrifying power expose him to an even greater, cosmic threat?