Hearing Chase in pain was something like a knife going through his heart, and yet he could do nothing about it. Then came the crazy boy from out of the woods, shouting out killing curses and all kinds of random spells. Even if his killing curse did hit, he doubted it was powerful enough to kill either of them. Yes he hated Nerezza right now, but he was nowhere near powerful enough to cast an effective killing curse, and frankly he was barking up the wrong tree fighting Nerezza and himself.
As soon as Nerezza turned to fight the other boy, Thomas quickly flicked his wand to create a shield charm around chase. Only Chase would know, and he doubted she would know it was from him. Turning around, he stared at Sterl and wondered what would make him do such a crazy act. He was clearly outnumbered in this situation, and Thomas's spellcasting and Nerezzas was way over his head. His only thought must be that he cared about Chase, and he must have really cared about her to come out screaming killing curses like that.
Trying to diffuse the situation with as minimal damage as possible, Thomas pointed his wand at a huge tree limb behind the boy. With a yank, the tree limb came flying off and was coming directly at the back of the boys head. With the oncoming spells from Nerezza, the boy found himself in a tight situation, and with Nerezzas insane personality, Thomas was not so sure he would make it out alive.