sentences:  Having left the slate where it was after the sealing is completed rather than secure it, the slate was forgotten throughout the ages even by the Makai Order until it was eventually dug up in present-day by archaeologists.The slate ended up in a museum as an archaeological relic until a mysterious person, who is later revealed to be Eiji Busujima, unraveled the seal after opening hours.Despite the slate's unsealing, Eyrith remains as a seed and is hidden within Idora, one of the Ady Slate Horrors who were also freed and each possessing the first human with inner darkness they come across.