Somehow it actually worked! All of Ciel's fears were replaced with feelings of excitement and adrenaline, maybe it was because he believed hard enough. Although he knew he had to think of something quick, something that would catch her off guard. I've come to terms with getting injured, if it brings rewards in the end. So let's do this, Himari... Ciel wasted no time and the time provided proved sufficient enough to devise another plan. At one end of the room, he placed a small piston-contraption that he made from his own metal, it would be activated by a small switch that he held, they were connected by a metal wire. He then turned his shoes into a make-shift pair of roller skates, four smooth metal wheels on each shoe. Afterwards, he shot one last chain from his right arm that stuck on to the wall on the opposite end of the room, closest to the door. Finally, Ciel carefully aligned his roller skates with the contraption he forged earlier.
He closed his eyes, concentrating his all of his remaining iron into one single point- his left arm. This reminded him of back then, when he used his left arm to capture Asta's lightning. That seems like such a long time ago. Yet, we all haven't gotten a chance to really get to know each other... so it couldn't of been that far. He felt a sudden coldness submerge his body, most likely due to the rapid movement of the iron. Though, he withstood it as hard as it was, since he could feel the power surging through his left arm. His eyes remained closed as he waited for the signal and there it was: Himari's voice! Ciel's eyes opened with the look of frustration combined with exhaustion, "This... this isn't my end!" Ciel shouted back whilst he pressed the switch he held, activating the piston device. The piston pushed his feet with a great force, propelling him forward and thanks to the wheels there was barely any friction stopping him. Maintaining a fast, steady momentum towards Himari, he saw that she had fired off a powerful lava blast. He threw the switch down. Alright, here goes, phase two! Please. Work!
Sliding toward Himari and consequently her blast as well, Ciel held out his charged-up left arm with a mysterious newfound determination. "Grand Shield!" He shouted those foreign words, as it was all or nothing, he just hoped that it'll turn out like he had imagined it. His eyes lit up when he saw a massive shield that was able to block his whole body, that consumed his entire arm to create. It collided with the blast, he couldn't stop here, he had to keep the momentum flowing at all costs. So he began to retract the chain he attached to the wall earlier, which in turn kept him moving forward. As the chain retracted, it directly fed the shield, repairing the parts that were getting melted upfront as well. Which wasn't even part of the plan but it worked. Ciel got closer, he had built the necessary momentum to ram Himari with enough force to shatter a wall. I know I can't save that hostage, but I'll do the next best thing and take her out with me! He grunted as he pushed forward, his adrenaline beginning to fade.