Harry Potter: Wizards Unite features Special (Brilliant) Events that allow players to compete to earn hard-to-find prizes. The first Special Assignment after the global release of the game was called Brilliant Event: Fantastic Flora and Fauna. This initial Brilliant Event featured animals and plants from the Forbidden Forest with three levels of assignments and an Event Registry that featured 6 items to find fragments for.
Special Assignments appear to occur every other week based on the schedule used in the first 60 days since the game’s launch. While more Brilliant Events are surely planned for the near future, they are unknown at this time.