Master Shimka's ocarina was a Force-imbued stone ocarina forged by the legendary Jedi artisan Master Shimka, which produced musical notes that could only be heard through the Force. It was created specifically to hypnotize Bogan – an enormous aquatic entity living near the core of the planet Kojiyo – and place it in a trance, after which it was hidden beneath the planet's surface in Master Shimka's tomb. Azora Lambert, utilizing a form of deep battle meditation which she combined with her flow-walking ability, was able to connect deeply with the Force on Kojiyo, allowing her to discover the location of the tomb, which had been buried and lost centuries earlier.
Azora then recovered the ocarina and used it to hypnotize Bogan a second time after the forces of Darth Harro disturbed the leviathan's sleep, preventing it from fully rousing and saving Kojiyo from total destruction. In addition to its effect on Bogan, a collection of musical pieces – dubbed the "Melodies of Master Shimka" by Azora – were left behind with the artifact which, Azora speculated, were likely capable of producing other, as-yet undiscovered effects.