The quote "Met them. Killed them. Got the T-shirt." from Rick Riordan's book "The Serpent's Shadow" succinctly captures the adventurous and often perilous experiences faced by the characters. It suggests a journey through encounters with formidable foes, leading to triumph, all while highlighting a playful sense of humor about the dangers they confront.

This expression reflects the essence of the story, where heroes face challenges head-on. It conveys the idea that surviving such encounters is not just about victory but also about embracing the wild experiences that come with it, almost as if they collect mementos from their adventures.