The Dragon Horn (竜の角笛,Ryū no Tsunobue?) is a horn that belonged to D.R.. D.R. supposely stole it and used it to summon the Dragon, but he broke it so no one could stop the dragon.
This article is a stub. You can help the One Piece Wiki byexpanding it. Please be aware that when you are watching official English translations that there may be name variations that are different from what is used on the wiki. Please read here for further clarification on what to use when writing summaries.