This is Doctor Novae Fame a Lego figure created by Ivan Martynov. Novae is a natural philosopher of House Pestilence. It is always great to get a little bit of backstory about original characters. This Lego figure is a very interesting collection of pieces. A Minifigure cape is used to create the hood, and two more make up the jacket/robe. A rubber band is used for a belt, which is essential for holding various medicines. A gold ring is used as a bracelet which connects to the clips uses for arms/hands. The headdress uses a rare Roborider disk flipped around (avoids the printed design on the other side). You can even find a custom/non-official shotgun built into the staff.
You can see more, and find more details about this Doctor Novae Fame over here: https://www.flickr.com/photos/brick_heretic/50061642688/