Derek Marvin is the intelligent member of the Young Guardians. He is a strong believer in reason and logic and unlike his teammates, he was the only one who was skeptical about their potential as superheroes. Originally, Derek was a slim youth, but after being exposed to the Genesis Spell, he is transformed into a physically strong young man with tremendous muscles. The powers he possesses include earth manipulation, superhuman durability, and elemental transmutation. With his elemental transmutation, Derek can use his earth manipulating abilities to alter the molecular structure of any earth-based element into whatever he chooses. For example, he could alter coal in order to create a type of crystal that is harder than diamonds to form armor and weapons. Despite his stubborn adherence to logic and skepticism of becoming a superhero, Derek accepts his new purpose in life and supports his teammates in their crusade against evil.