I'm looking for a story i read a long time ago. Mc got a weak territory with a small village from his family. But you have nature spirits that enhance the quality and yield of things (ex peanut tree spirit, some magic flower spirits that the family power is based on i think). But he got a system that gives out missions so he has a high chance to create those spirits. I think the spirits where named gu like in Reverend Insanity. No idea where i read this story and i gave spent hours looking for it.
The Defeated Dragon - note: it seems the cover art was changed on NU, so ignore it because it doesn't represent the tone of the novel. I'll toss this in because it's cute: https://www.asurascans.com/comics/spirit-farmer/