Tephra Cave (テフラ洞窟) is a Field Track in 异度神剑, composed and arranged by Manami Kiyota. It is track 6 of disc 3 from the 异度神剑 Original Soundtrack. This music is heard while the party is inside Tephra Cave, though it does not play when the party reaches the outdoor portion at Kneecap Hill on the approach to the Bionis' Leg.
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