I'm a Farmer, Also a Celestial

I'm a Farmer, Also a Celestial Plot:

Ah Niu from Kaoshan Tun is a rough man who only knows how to plow fields and feed pigs, with his only concern being his seriously ill grandmother. Until he accidentally triggers an ancient formation under the old locust tree and awakens his celestial bloodline—his touch can make withered seedlings sprout new shoots, and his fingers can cure stubborn diseases. But the joy doesn't last long: he discovers every use of his celestial power shortens his grandmother's life by one day. Just then, a century-long drought hits the village—riverbeds crack wide enough to fit a fist, and villagers kneel weeping at his door, begging the "celestial" to save them. Holding his grandmother's skinny hand, watching the thirsty children wailing outside the window, will Ah Niu choose to "keep his dearest one" or "save the whole village"?