During the Hirudegarn war, Tapion and Minotia are given the enchanted ocarinas to play in order to distract Hirudegarn long enough for a Konatsian Wizard to cleave the monster in two with a powerful enchanted sword. These ocarinas are somehow able to create a tune that ensues rage upon Hirudegarn, and Tapion notes that he nor his brother knew how to play them, they simply just gave off the melody once blown into.
Over one-thousand years later, after Tapion is released from his music box, Hoi attempts to steal and break the Hero's Flute so that it could not be used to stop Hirudegarn once he was fully free from Tapion's body. Hoi fails however, and Tapion later uses the instrument against Hirudegarn, which eventually fails. The instrument is shattered upon Hirudegarn's escape from Tapion's body.
Video Game Appearances
"Form a barrier by playing your flute! Assist effects will still apply to allies when the barrier is up."
In Dragon Ball Xenoverse 2 as part of the Extra Pack 1 DLC, Hero's Flute appears as one of Tapion's Super Skills. Like in the Budokai Tenkaichi series, it creates a magical barrier around the user that protects the user from attack.
In Dragon Ball Legends, it appears under the name Flute of Sealing where it is the Special Quirk Skill Arts for Tapion (DBL19-03S).