The Void of Calamity is a Hardmode, Expert Mode-exclusive accessory that is obtained from the Treasure Bag dropped by Calamitas. It increases the player's damage by 15% and causes brimstone fire to fall from the sky while invincibility is active, such as when the player takes damage, enters the world, or uses a Magic Mirror; however, it also decreases the player's damage reduction by 15%, causing the player to take more damage.
- The Void of Calamity cannot be equipped if the player is wearing the Void of Extinction accessory, and vice versa.
- The brimstone fire has a base damage of 30.
- This accessory is outclassed in some respects by the class emblems, which have the same damage boost and no penalty.
- This item was originally known as the "Ring of Calamity," and was what cursed Calamitas into her current form.