Complete!
Doctor Who/Doctor Strange Crossover
When the Master breaks into Kamar-Taj - in an attempt to steal something - before disappearing without a trace, the Sorcerers quickly realise they need an expert to help them make sense of it.
Takes place somewhere between 'The Last of the Timelords' and 'Partners in Crime' for the Doctor, and 'Doctor Strange' and 'Avengers: Infinity War' for Doctor Strange and Wong. Set in about 2017.
If you enjoyed this, please check out my Doctor Who One-Shots and Crossovers book!
For context, the Master is a new incarnation (that I made up) that comes after the Master from the 13th Doctor's Era - the regeneration at the start is 13th Doctor Era Master - New Master