Mithias stood up abruptly and pushed his chair back. He was shocked, and his brow had a furrowed, perplexed look. At first he blinked at Tsukune. "You freely offer me your blood?" The red liquid radiated a power that resonated with Mithias. He could feel it in the air before him as he watched it start to spill. Each drop that Mithias allowed to fall to the floor was a sin. He couldn't ask questions. There was no time, and he didn't have the place. he had no idea why Tsukune would offer his own blood instead of taking Mithias', nor how that would get them out of this stone together. yet Instinct rang in his ears, telling him to drink at such a sight. Although overwhelmed with gratitude, and temerity, Mithias couldn't deny that a large part of him wanted power. Too long had he been tossed around by demons and deities and unstoppable immortals, but yet he hated himself for such weakness of character. He didn't want that to be the reason he accepted. ...not that Tsukune couldn't have forced it on him. 

Completely at a loss for words, Mithias' expression and action had to speak for him. Eager for the blood, yet horrified at his loss of manors, he swiftly dropped to his knees before Tsukune and took his arm. His head bowed, he hesitated only briefly, almost trembling. "I will take you with me, forever, Tsukune." He placed his mouth over the wound and drank. The vampire's blood flowed into him, but not passively. It's power had found a new host and it entered with command, changing him, becoming part of him. Mithias had willingly become a child of Tsukune.