Critical Strike was divided into 3 stages. The first stage instantly doubled the strength of his Sword Intent, the 2nd stage could provide 2 times more strength to his Sword Intent, and the 3rd stage could provide 5 times more strength to it. However, Critical Strike was extremely difficult to cultivate because its requirements were very high.
Firstly, the person attempting to cultivate it had to possess 8th level Sword Intent or above. Secondly, that person must possess the Enlightened Sword Heart. Most importantly, that person’s control of Sword Intent must attain an extremely terrifying state of being able to condense Sword Intent into a single dot before detonating it!