Roy smiled. "That's right. The specific elements not he array direct my will at the oxygen and other flammable gasses in the air. I can make as small or as large of a fire as needed with just a snap of my fingers. I'm only limited by my ability to channel the energy for the transmutation."
He glanced at Pierce. "It's a shame Edward's not around. He could really show off. My alchemy's limited, due to its destructive nature. Edward can do it without an array, and he can do pretty much anything he wants. He's built two apartment buildings and a hospital with almost nothing but alchemy."