"My family has been making my life hell for a long time," Percy replied. "I'm better at getting back at them." He also had the power.
Percy listened with his eyes firmly closed, and smiled. "One, you shouldn't have been here in the first place and two, you'll get even more bored here. We both know you don't do well with this place." Three, he couldn't try to leave with Cass there, not that he could move. "I'd be fine even alone, but thank you."