Dweomerkeeper

The Lady of Mysteries is the Weave, the conduit that allows mortal spellcasters to employ the raw force that is magic, and she encourages all creatures to explore its mysteries. Dweomerkeepers are Mystra’s shepherds, safeguarding the Weave against threats to its integrity. They are also skilled practitioners of the Art, who seek to explore magical theory and create new spells and magic items.
Most dweomerkeepers are cleric/wizards or cleric/sorcerers, although other class combinations, particularly those including specialist wizard, bard, and ranger, are not unknown.
Dweomerkeepers are found throughout Faerûn. Some dwell in lonely, isolated towers, wholly consumed with their magical studies. Others dwell in huge cities, where all manner of magic is brought together and shared (willingly or not).