It itself is a very high-level sealing artifact, and it has the ability to maintain a 'time freeze' effect. Even if you stuff an Evil God inside, it can't escape as long as the coffin is intact.
Unfortunately, these two things are disposable.
Oh, this kind of high-end knowledge has gone extinct now, ever since the Clan of Secret Blood went into concealment, the highest-end knowledge within our Blood race can no longer be inherited or learned."
"Uh, is that so?"
Phemys blinked and asked:
"So, Triss, you are the most powerful Psychic in the history of the Blood Vulture Clan, can't you find a way to contact the Clan of Secret Blood? They just hid, right?"
"Well, there's a rumor that those guys found a new patron after their ancient Duke, Lady Constantius, mysteriously disappeared during the Second Black Disaster. Now they've relocated their entire clan to an unknown land and have completely severed contact with us.
