One Piece's Strongest Summoning System

A 21st-century otaku travels to the pirate world and becomes Gol D. Rakshasa, the nephew and adopted son of the Pirate King, Gol D. Roger! Possessing what's hailed as the most powerful summoning system in history, the World Government declares, "I have CP0-CP9." Gol D. Rakshasa: "I have the Eight Swords of Yue, Guigu Zongheng, the Three Sages of Confucianism, and Shadow Secret Zhang Han." The Navy declares, "We have the Marshal, the Three Admirals, the Admiral Candidates, and the Hero Garp." Gol D. Rakshasa: "I have Squad Zero, the Gotei 13, the Ten Espadas of Kuroyoru, and the Masked Corps!" P.S. A new author and new book, please collect and recommend! It's signed, so rest assured!