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your oc has a very strong intrest in mystical beings (It doesnt matter how, like killing them, capturing or collecting, or just documenting them) and they have been reaserching about a wingless, slim dragon on that can emit sonic booms at will, for combat or mobility; They often live in solitude, freezing enviroments, and since your oc has nothing better to do, they go to hunt one down, soon enough they have traveled to a mostly unexplored, frozen tundra, with supplies enough to last you a couple months, and a vehical built for snow, you start to drive through it, in the distance you can see snow covered mountains, but other than that, it seems to be just flat land