One second he's holding the camera that was showing the destruction of Beacon then the next he is clawing at his skin. Black ink like liquid spread onto his being.
Mercury yelled in pain as the acid of the Grimm dragon covered him.
"Mercury!" Emerald screamed as her partner was soon hunched over. The black essence cover him and hardened. It what happened next what made the thief run.
A white mask appear where around Mercury's eyes and forehead were covered. The black essence soaked into his clothes making them leather black. His legs became whole muscle again. In between his shoulder blades the black essence bubbles then wings span out looking much like the dragon's. Skin now a dark gray. White bone armor appeared. Rip cage armor and forearm plates.
This new Grimm that had taken over Mercury rose and roared. Clawed fingers flexed before leaping into the air. Hunters and huntress watch as this new humanoid and dragon like Grimm head straight towards one of the last airships still flying.
Now gray eyes with a hint of amber had a full view of the destruction just below him.