For a moment, Mantis was ecstatic. He was so pleased with himself, that he had managed to break through the thick steel wall. The wall that he would have just deemed impossible for him to break through.
After seeing Raze do it again and again though, he just had to give it a try. He knew his new body was stronger, and he had an idea from watching how Raze used his Void Pulse. He gathered the Qi in the back of his hand, and twisted his fist to put all of the Qi in one point, exploding out.
The results weren't what he had expected, but he tried it again, putting more Qi to the back of his hand, and unknowingly to himself, focusing so hard on those points, had caused his back to partly transform, as well as his hand and with the extra power of his Hybrid form, he smashed right through the thick steel, and in turn arrived on the other side, where there were countless people staring and looking at who had just entered.