[Ka-el]

Spoiler for spoiler 226:

As obvious, the domain expansion won't be the end of the fight, Sukuna will have to use all his powers to fight Gojo so maybe we will see also his flame technique and his true form with 4 arms. This is a battle between efficiency and quantity. Sukuna has a colossal amount of cursed energy while Gojo is a monster in efficiency thanks to his six eyes and his being a genius. Sukuna proved to have the upper hand in a domain battle thanks to his combination of a barrierless domain + extreme power within it that can compensate Gojo's domain output. Gojo however used his reverse cursed technique to heal faster than Sukuna's slashes strenght and also he used the reverse cursed technique to recharge his cursed technique, all this fighting Sukuna inside his domain and creating more tha once a simple domain to gain time.