You are the host of a large fragment of the Soul King, an example being a large portion of the Soul Chain possessed by Aura Michibane. This gives you an immense amount of spiritual power, enough to fight a Shinigami Captain to standstill. This also allows you to command the souls of the objects around you on a greater scale, allowing you to manipulate the world around you as you see fit as well as replicate the effects of Kido with a wave of your hand. Your special ability as a Fullbringer also gets an immense boost both in breadth and depth, allowing you to compete with the Shikai and Bankai of the Captains of Gotei 13. You have also mastered the various Fullbringer specific techniques like Bringer Light. As the second person reaching this level, there are many other powers and abilities left for you to discover with time.