Studying ancient texts, you slowly come to gain the power of telegony, unlocking the combined genetic memories of not just your ancestors, but all your ancestors’ previous sexual partners, too. Which, ok, first of all, is admittedly kind of weird (you had never thought about your ancestors like this), and second of all, gives you an incredible download of knowledge that strikes you like a thunderbolt.... aaaand it's mostly how to gather plants. Bit of farming in there, but really, it's just hundreds of thousands of years of picking up seeds, taking them with you, and then eating them later. But here's the thing with this knowledge, all the plants in the area you walked by earlier suddenly go from being just "plants" to being familiar landmarks in your memory, and you remember how to walk back to your tent, plant by plant. Setting off, you sneak out of the castle and quickly navigate to your campsite bush by bush, then crawl in for a good morning's sleep.