Healing

Ning had another chunk of knowledge flow directly into his mind, telling him of the location of Derria's organ and its constituents. The surface of that was crystallizing as well. 

"Don't worry, I'll heal you!" Ning said out loud to Derria and focused his attention on Katie.

He knew everything he needed to know, so all he needed to do now was think about the crystal beyond this point in his body and use the power of Spark flowing through him to convert it.

The past few days of training, where he had forced himself to convert things while only knowing where they were, were being put to use right now.

He put all of his mind into just converting the crystals and nothing else. Once his mind was in the right place, Ning used the power.

As soon as he was done, he stepped back, but there was no time to make sure Katie had been healed properly. If he didn't hurry up, this knowledge that he had in his mind right now would disappear.