The One Piece Illustration Box series has become one of the more distinctive threads in the One Piece Card Game, pairing the franchise's collectible trading cards with a strong emphasis on artwork that rewards close looking. Volume 6 arrived in 2026 and carries the Promo designation, a label collectors use to set these releases apart from the core booster sets. Promotional cards tend to hold a special place in the hobby because they are often released in more limited or unusual circumstances, and they become touchstones for people building a complete picture of a set's era. Card 108 features Donquixote Rosinante, the Donquixote Family figure whose story threads quietly through the larger narrative of the series. Collectors are drawn to the character for his complicated loyalties and the emotional weight he carries in the story, and this card offers a chance to hold that character in a piece of artwork designed to stand on its own. It makes a fitting centerpiece for a collection devoted to the series' more reflective characters.