Zero returned her gaze; although still firm, he was calm in the presence of Yuuki's reaction and response, alike. He didn't need to guess how she was feeling right about now.

More than anyone, he knew and understood what it was like to starve, didn't he? Not to mention, unlike Yuuki, Zero had technically already lived through this experience.

"If I wasn't, do you truly believe I would make the offer, Yuuki?" he asked. "You know me better than that."

Zero took a step back from Yuuki, giving them a bit of room. "I'm not sure how much more you know about where we are, but I've been told that everyone here is able to regenerate upon being injured. Death is not a possibility. I have no issue in what I'm offering to do for you."

Honest and true. Zero opened the scissors, one blade poised just above his wrist, before he commented on one more thing, firmly meeting Yuuki's gaze.

"If it still is something I can do here, though my blood, I want you to witness what I've experienced in the time that spans between what I last remember, compared to your most recent memory, Yuuki." He paused, frowning a bit. "Don't dig much further than that."

That said, Zero grit his teeth and made one, clean (and rather deep) slice across his wrist, and held it out for Yuuki to take.