The most powerful thing*
Alex's jaw dropped, and then he rubbed his forehead with his hand. He didn't know Kai had done something that grave. He thought no one could do that practice anymore. Some vampire royal guards in the past were trained to do that to kill themselves in case an enemy captures them to spill secrets or confidential matters. But it was a practice that was supposed to be long forbidden and forgotten.
"I don't know how he did it. Even you, the oldest vampire, doesn't know the secret behind that practice." Zeke said as he sipped in his drink again.
Zeke was right. Alex knew about that practice, but he never once paid any attention to it before. It was already a secret and forbidden practice even before he became immortal. Hence, it only made sense that vampires nowadays only had very little to no knowledge about it. It was definitely a shock that Kai managed to execute it and also miraculously managed to survive it.
"Did you confront him about it?"