Warlock Ch 142. Sleep is For The Weak
"Sleep is for the weak," Cassius said, folding his arms. "Warlocks make sacrifices. You know that better than anyone."
"Sacrifices? Sacrifices?" Damian pointed at the books again. "This isn't a sacrifice; this is punishment! You're punishing me for surviving that ridiculous shadow gauntlet!"
Cassius tilted his head thoughtfully. "Would you prefer another round with the shadows?"
Damian froze, his mouth opening and closing as he tried to decide whether it was worth continuing the argument. Finally, he groaned and grabbed the top book from the stack. "Fine. But if I pass out tomorrow, it's on you."
Cassius smirked, clearly unfazed. "If you pass out, I'll simply wake you. Warlocks don't quit."