Black Castle.
"It happened when he was on the verge of death. He used the last bit of power he had to leave his legacy on this mark." Said Daniel while tapping his forehead, right where the blood red sun was printed like a fresh tattoo.
His companions looked at him with confusion, squeezing their eyes as if unable to see what Daniel was pointing at. "I can't see anything. Are you sure it wasn't just a bit of blood you've already rubbed clean off?" Asked Ligart while mimicking the motion of rubbing his own skin.
"It's here.." added Daniel after putting his hand down, and leaning over the back of his chair with crossed arms. "I don't know how many will come this time, but I have to assume that this mark is some sort of beacon, and that finding us will only be a matter of time from the moment they'll enter this universe."