NO EDITION.
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"We can open the door from the inside only with your permission, and we can open it from Sacred Hall at a specific time of the year. If we do not meet the requirements, it cannot be opened."
Heinrich added. As he felt his little Master's confusion.
'Then why the blood?' Little Mara frowned.
"You see, the door has a mechanism. You could open the door because it was time for it to happen, but in order for you to get in, the door had to identify you."
'Oh?' Little Mara raised her eyebrow.
Sensing her interest, Heinrich continued.
"One way or another, the door only opens when it meets the key requirement, your blood, to recognize you."
They can open the door from Sacred Hall in specific time. But in order to enter, the door must recognize her. And if she wants to leave the Dungeon, she must identify herself for the door to open.
