DR WHO? It's all about Missy.
Missy is the latest incarnation of one of the Doctor’s oldest friends and quite possibly his most ruthless enemy - the Master. Missy doesn't carry a sonic screwdriver like the Dr, instead she carries her trusty "sonic" umbrella. We believe this was first seen in the episode "World Enough and Time" and was last seen in "The Doctor Falls". It was a pleasure to create such a prop.