The remaining Sonic Hawk didn't use only its physical strength and its enhanced innate abilities in the last attack. It had used one of the spells in its possession during that charge.
The chains that kept it bound to the ground began to shine as the anger for the death of its brother filled the hybrid's mind. The inscribed item tried to suppress its instincts from taking control of its mental faculties, but the emotions of the Hawk were too intense and kept on fueling its insanity.
Nevertheless, that didn't seem to stop it from using spells.
Noah's eyes sharpened when he saw the cuts on his arms. Generally speaking, a hybrid taken over by its emotions would rely on its beast side to fight. Yet, the Hawk had used even its human side in the previous charge.