I! Marquis De Vauban!

Traveling to the world of God Killer for hundreds of years, he has successfully changed the fate of the original and became the new Marquis of Vauban. And just after Woban became a full-level God Killer, his system finally arrived and brought Woban into the world of One Piece. The Twelve Shields, Zeref, and the Black Dragon King are the guardian saints of the Fairy Tail world. The Ten Blades, Aizen, and Gin of the Bleach World. … These familiar characters appeared one by one under the command of the God-killing Demon King. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.