The Council agrees,” Zeus said. “Percy Jackson, you will have one gift from the gods.”I hesitated. “Any gift?”Zeus nodded grimly. “I know what you will ask. The greatest gift of all. Yes, if you want it, it shall be yours. The gods have not bestowed this gift on a mortal hero in many centuries, but, Perseus Jackson-if you wish it-you shall be made a god. Immortal. Undying. You shall serve as your father’s lieutenant for all time.”I stared at him, stunned. “Um…a god?”Zeus rolled his eyes. “A dimwitted god, apparently. But yes. With the consensus of the entire Council, I can make you immortal. Then I will have to put up with you forever.””Hmm,” Ares mused. “That means I can smash him to a pulp as often as I want, and he’ll just keep coming back for more. I like this idea.
Rick Riordan, The Last Olympian