When Raze used his Dark Magic to surround his feet, it was clear that this allowed him to move freely. The properties of Dark Magic were to destroy, and in some cases, it could also be used as a healing tool. When Raze first encountered Dame and his group, he had used his Dark Magic to obliterate parts of the infection, giving him the idea for his current situation.
It would hurt his allies, but he could get rid of all the visual Qi that was weighing them down and holding them in place, which is exactly what he had done. Using his Dark Magic, he sent a ripple through the arena, destroying the visual Qi.
Now, once again, everyone was able to move: Dame, Amir, Alba, Safa, Rayna, Ricktor, and Mada. All of them were fine again. Cronker and the more injured members of the Crimson Crane had managed to shuffle their bodies to the edge of the arena, knowing they couldn't really help anymore.