Constulgrael

Constulgrael was the only true Dragon to become Magister. He reigned from 983 DR to 986 DR.

History
Constulgrael was a Black dragon great wyrm in 983 when during a hunt (slay all other Black dragons he met, slay dragons of other kind if it was possible without danger and find a female black dragon as mate) he met in a swamp Malune Nalonkrivar the reigning Magister. Unseen Constulgrael ambushed on surprise Malune and easily kill him. During the sack of the properties of the wizard the power of the Magister entered in him. Bewildered the dragon asked answers to Mystra. Soon Azuth appeared to explain; they made bargain and Constulgrael promise to spread magic in the Realms. In time he come to enjoy his position, however he destroyed some towns in Thay in fight with challenging wizards. So a party of Red Wizards of Thay decided to hunt him, greatly weakening him before Constulgrael met his doom in the Howling Caverns by Meldryn Jalensifer.