Create a detailed fantasy coin used by adventurers in a world filled with dungeons and monsters. The coin should be made of ancient, weathered metal with mystical engravings. On one side, depict a brave adventurer wielding a sword, standing triumphantly over a defeated dragon. On the other side, show a detailed map of a mythical land with marked locations of famous dungeons. The coin should have an aura of magic and ancient craftsmanship, with runes and symbols around the edges. The design should evoke a sense of history, bravery, and the thrill of adventure.