Using both his divine sense and All-Seeing Heavenly Eyes (Black) talent, Alister saw through the souls of all the seven heroes.
All the seven heroes, without any exception, had Fantasia's divine mark engraved on their souls. It was like a slave collar but placed by a god on a mortal's soul.
And unlike a slave collar that had limits, the divine mark placed by Fantasia on the heroes would absorb part of their soul energy and use it to elevate its power.
In other words, no matter how powerful the heroes become, they will always become Fantasia's slaves.
'Although the divine mark is powerful, it still isn't absolute. At least, if the heroes manage to reach Four-Digit, then they can break free from the divine mark.'