Possibly the Greatest Alchemist of All Time — S1 E10 - Takumi Takes on Pioneering!

Takumi’s group challenges the dungeon, Forest of the Beast King, and strengthens their bonds. Around that time Marquis Godwin consults with Takumi, and asks him to help create a pioneer village in the undeveloped lands to the south of his domain in order to secure a place for the refugees from a deserted village nearby.