Undead Dragons?!

Jack reappeared at Duorda's side. The black-bladed katana was already in motion, arcing toward Duorda's elbow. Blood-red energy coated the blade as Jack struggled to cleave through the crypt lord's arm, leaving a wave of powerful sword energy fading against the ceiling.

"CRACK!"

After much effort, Jack used the skill again to back away. He still felt uncomfortable as Duorda only laughed harder after tanking the attack.

"Good… It's been too long since I've received true damage," Duorda commented, casually picking up his forearm from the ground. Then, the crypt lord reattached it with a wash of black energy. After that energy faded, the arm was restored to its perfect, undead form while some of Duorda's health had vanished.

Startled, Jack asked, "You can fix your broken body at the cost of some health?"