Wizard in the World of Pirates

The soul from the earth is reborn in the wizarding world, and discovers the biggest secret he carries at the last moment of his life... In the second reincarnation, he was reborn in the pirate world and started the world harvest mode. "In infinite time and space, the freest one is the Pirate King!" Pirate world, sail in the East China Sea! Douluo Continent, the martial soul awakens! Ps. The protagonist is a necromancer.