Trying to do a possession? Good luck with that, you'll be crushed by the gays.
But "Incantation roll"? Interesting. The kid actually did it! Its similar to certain stories about Runes. If you write "Fireball" on a rune, how do you do it?
One story put it as writing all the letters in the same space, so you write F, then I, and continue onwards. On 1 tiny stone, is the spell "Fireball". Personal grenades at the finest.
But what about "Vacuum"? That's even more deadly.