Apparently when his body was possessed, all the skills were unlocked for the system to use, whatever skill it used had to be one of the last ones he would unlock, as it seemed extremely powerful. Milo hadn't raised his Magical Power stat high enough for that skill to be revealed yet, but it did something that allowed him to drain a target's Magic Power. What else it did, Milo had no idea but he would find out once it was unlocked. The idea of draining Magic Power from a target was definitely an attractive skill to have as it would add one more way to increase his Magic Power stat.
After checking himself over still, he returned to the hospital bed and went through the events that had happened during the attack over again in his head. He started to tremble in anger and sadness recounting the events leading up to Corinna's death. This caused his heart rate to increase sending a message to the nurse who was caring for him.