You can wield Sorcery with sufficient skill as someone with the ability to wield High Arcana. You can use magic to ward areas, summon beings, call upon the elements and more. You can choose which tradition of magic you follow, such as Trismegistan, Jaquinite or Ligurian. If you choose Ligurian, then you are bestowed the innate abilities that the Gigantes had that make using it possible.