Under the effect of the "Return" divine word, the bloodline's blood magic and shape-shifting abilities were sealed. Even a prince-level vampire couldn't possibly possess the physical strength to puncture through rib bones and extract a heart by hand.
However, Aiden immediately understood how the other had managed to do it—this lunatic, who derived pleasure from killing, must have used the "Death Rip" divine power on himself, forcibly extracting his own vital organ. And because the "Undying" power was in effect, he wouldn't die from the "Death Rip" power.
What Aiden couldn't figure out was why the other party would make such a meaningless suicidal move at this critical juncture.
Could it be that, since his feet were crippled and his movements were hindered, he was planning a desperate throw of his heart as a projectile weapon?