It's a story old as legend itself: up atop the mountain, not a mile off from the little village, lives a ferocious beast. A dragon shifter, who they say holds dominion over the land. Every three years, the village sends up a virgin sacrifice, in hopes of keeping in good standing with the creature.
You don't know why they keep sending these people. Every time you emerge to ask why they've sent another sacrifice, the high priest and his entourage have already fled in fear.
This year, one auspicious spring morning, another sacrifice is being hiked up the mountain. A timid young lad, clad in ceremonial white robes. To your surprise, as the high priest hands over your offering, he stops just long enough to tell you that this one was supposedly your mate. Of course, the humans all fled before you could get any more explanation out of them.