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Harmonia Crystal.png

Harmonia Crystal (ハルモニア鉱石 Harumonia Kouseki?) is a beautiful stone first discovered in the year 2000. Its name was derived from the word "harmony" after the crystal's unusual response of generating energy upon exposure to music. The energy released by the crystal was of great interest to many researchers, which led to the creation of the Musicarts, which can use the "power of music" released by these crystals to fight against the D2.

Trivia

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