Critical Strike talent can be upgraded.

Ten times, a hundred times, a thousand times, ten thousand times.

Four top-grade Qi and Blood Pills, plus a 20x critical hit to obtain 80 top-grade Qi and Blood Pills.

Heavenly-grade artifacts, 1000x critical hits! Congratulations on obtaining 1000 Heavenly-grade artifacts.

Enlightenment Tea, a 10,000x critical hit! Congratulations on obtaining 10,000 Enlightenment Teas.

100 proficiency points, 10,000x critical hit! Congratulations on gaining 1 million proficiency points!

What? You have an ancestral heirloom? I could easily throw away tens of thousands of those things!!!