This is a Blue Rocks D. Xebec (OP17-039) Main Deck from the One Piece Card Game.
It is a 50-card constructed deck (plus the Leader) built around the OP17 Blue Rocks D. Xebec Leader, focused on Rocks Pirates characters such as Kaido, Charlotte Linlin, Edward Newgate, and Shiki. This type of list has been popular and competitive in the OP17 format.
This is a typical Rocks Pirates tribal build that emphasizes card advantage through the Leader’s attack trigger, board control, and powerful late-game plays with the high-cost Rocks D. Xebec character.