C286 First Tribulation Realm Means

In an instant, he also shot out a drop of true blood, and the divine power that gathered into a sea was drawn out by him, bursting out with immense pressure that made the spectators far away feel their scalps go numb...

These divine energy gathered on his fist and immediately transformed into a huge super Magical Seal. There was a red skull inside this Magical Seal. It was extremely sinister