Pandora's jock

Previously

…“No! Not now!” her voice hissed, a frantic edge to her usual command. “You’re pushing too hard! The borrowed energy… it’s burning you!” Mark’s vision swam. The pain intensified, a fiery agony that consumed him. He could feel his leg buckling, his body rebelling against the unnatural strain. He saw Anna and Serina, their faces etched with concern, gaining on him with alarming speed. The thrill of victory curdled into a cold dread. He had been so focused on crushing them, he had forgotten the true cost of Lyra’s shortcuts. He had forgotten that some prices, once paid, could never be undone.