You can't do it yourself; other people have to cast the spells for you. It's part of what makes the community so close-knit. We all help each other here :3
Spells are obtained by sitting next to a sleeping deer (pelt), eating mushrooms off a tree (mask), knocking down and eating a pinecone (antlers), and falling asleep in a mushroom circle (shape).
If your deer is still a fawn, you will not be able to keep any spells that are cast on you.
Fawns grow up 30 days after registration.