Sorcery is the highly technical, almost scientific form of magic that is the province of wizards. There are many tomes and courses on this magic, and indeed reference to the link http://www.sable.org.uk/05Magic will give far more detail on the subject than this humble GM ever wishes to write.

All magic takes energy, and in the case of sorcery, that energy comes from the individual who is casting the spell. So, in general, the sky is a little bit over the limit. But sorcery is such a well researched subject, in the places where such things are known at all, that there are a really significant number of quite powerful things that can be done with sorcery.

It goes without saying that there are no known colleges of magic on Earth where Sorcery can be learnt. Or are there...