The Order of Knowledge is home to great libraries and keepers of knowledge. This faction was formed to practice the ancient magic of previous gods of magic. They are the most powerful group of casters to ever come together and are at a height of power. There was no spell ever cast they have no access to. The Goddess of magic is their founder and glorious leader her name is Elia Martell.
The Order of Knowledge is a group simply dedicated to knowledge of all things. Many members of this group are casters that are intent on learning the greatest magics possible and available. This group is also dedicated to finding the magics of ancient times and learning to make use of them. This group however is very selective of their members.
If the party were to bring them Proof of the destruction of Litch King forces, they would likely reward the party and lift some restrictions on them