Sigil is a fancy word for a cool picture that's supposed to make magic happen! When people want something really bad, like a new toy or a friend to play with, sometimes they will draw a special picture called a sigil that represents what they want.
Some people believe that when you draw a sigil, the picture sort of captures your desire and sends it out into the world, almost like a magic message in a bottle.
The idea is that the more you look at the sigil and think about what you want, the better your chances are of actually getting it. So the sigil is like a special secret way of wishing for something and believing that it will come true.
But remember, it's important to have good intentions when you make a sigil! You don't want to use magic for bad things, like making someone else feel bad or tricking them. That's not nice, and it's not the kind of magic that works anyways. So use your sigil powers for good, and believe in the magic of your own wishes and dreams!