Design of an Old Style of Summoning.
The Sealing Room.
The Sealing Room is the place where the ancestors of Temujin sealed the Stone of Gelel and swore that they would never again revive it.
In the center of the room there is a design of an old style of summoning. It is bound by the blood of the main branch of Temujin's clan. This is used to summon a Black Hole. Once the person has activated the technique, it was falsely believed that they will never come back alive.