Waterdeep:Mirt

Mirt is a human, who retired from adventuring after making a fortune doing so. Mirt is a member of the Harpers, introduced to you by Mattrim "Threestrings" Mereg.

Although he has grown soft in the flesh, he remains deceptively strong, vigorous, and clear of mind. He inducted Randolph Vistar into the Harpers.

The Celestite Unicorn

Mirt sent you to recover a unicorn statue from a dangerous dungeon in the Sea Ward called Blue Alley. As it turns out, the Celestite Unicorn was in fact an actual unicorn named Primara, who had been transformed into a statue, and Mirt was seeking a means of reversing the transformation.