There have been some dark aspects of the Zelda series that are easily some of the more memorable parts of each game. The eerie, ominous places that Link often travels to are filled to the brim with danger, but what is usually the harbinger of that danger is a whole load of ghosts. From characters to monsters to bosses, ghosts have shown up in Zelda since the first game’s release 30 years ago, and it has not slowed down to…