Superfan Survey: What Powerful Rune Would You Create? Runes are crazy important in the Shadow World, without them our warriors would be in big trouble! Have you ever wondered what you'd create if you had the chance? Well here's your moment to shine. If you could design a new type of rune what would it be, and why? Let us know in the comment section below! Do you have any favorites in the comments? Let your fellow Shadowhunters fans know!