The 5,000 spirit war

The 5,000 spirit war, otherwise known as the Soul calamity, was a catastrophic event that causes the demise of the 6 and the destruction of the entity known only as Lihem Akillt.

Summary
The soul calamity took place 25 years after the founding of the six Harmonies: Compassion, Justice, Loyalty, Tranquility, Honesty, Resoluteness and the creation of Lihem Akillt. Lihem Akillt's name meant Kill them all.

He had the Zora curse, an ancient catch that affects children of Racah Akillt, as a remnant from a certain divine beast which caused her mass killings. In 23 years, the curse would activate and Lihem would become just like Racah, a Genocidal Maniac. Doctors became aware of this since he was 6 years old and attempted to disband the curse, except they made one fatal error. The disbanding chant followed as "Curse of Raca Akillt, disband from the eye. Make the effects nil, so we won't see their evil. Disperse yourself and never return, for revival will cause your burn." The error was with Racah's last name. The chant had to be written and then pronounced, but one doctor misspelled her name as A kilt and pronounced it that way.

Dark Energy amassed from the mistaken spell, as Lihem became a demon of blood and flesh