ocarina
The ocarina is an ancient wind musical instrument—a type of vessel flute. Variations exist, but a typical ocarina is an enclosed space with four to twelve finger holes and a mouthpiece that projects from the body. It is traditionally made from clay or ceramic, but other materials are also used—such as plastic, wood, glass, metal, or bone.
Be honest, you only know what this is because you've played The Legend of Zelda: Ocarina of Time.
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This tag implicates wind_instrument (learn more).