Opening it up, it’s not so much instructions on casting, it’s an incantation! Even more useful! Incantations aren’t just another form of casting spells, they change the property of your casts. Basically you start naturally using lighting, cast an incant, now you can use fire. With others it would drain them passively until their magic has burned away. With me, my magic naturally cycles because of my absorption so I can theoretically hold an incantation forever. 