Traveling to ancient tribes to build infrastructure

“I woke up with a splitting headache, only to realize I had transmigrated into the body of a fragile rodent-variant female in a brutal, mutated wasteland. Before I could even process my new reality, I was shoved into a mandatory pairing auction. The guards gave me exactly ten seconds to find a partner, or I would be sent to the deadly border patrol squads as cannon fodder. Three massive, heavily scarred mutants with greedy eyes immediately locked onto me, ready to claim me as their plaything. Desperate for a legal shield, I scrambled away from the brutes and made a shocking choice. I walked straight up to the one person everyone else was avoiding like the plague-a sickly, pale man coughing up dark red blood in the corner. "Partner up. I need a shield, you need a caretaker." When the guard registered our names, the entire square erupted in open mockery. The chieftain even warned me that my new partner was poisoned, a dead man walking who couldn't hunt or protect me. In their eyes, a weakling and a dying man were nothing but a joke, doomed to freeze or starve. But the jeering crowd didn't know two things. First, I possessed a wealth of old-world survival knowledge. Second, the fragile man sleeping on my stone bed wasn't just a dying invalid. Why would an elite silver wolf warrior with terrifying, suppressed power hide among the lowest of the low? I didn't care about his secrets. Looking at the barren dirt behind our rundown shelter, I handed him a stone hoe. While the rest of the camp waited for us to die, we were going to build an impenetrable underground fortress.”