|Type||Midyear Mayhem Achievements|
- Defeat all the Patrolling Horrors in the Imperial City during the Midyear Mayhem.
Midyear Horror is awarded for defeating all of the Patrolling Horrors in the Imperial City during the Midyear Mayhem event. The achievement was added during the 2018 season of the event. Other than being time-limited to the event, it is essentially the same as the Horror of Horrors achievement, so if you have not achieved that yet, you will receive it at the same time.