The Void of Extinction is a Hardmode, Expert Mode-exclusive accessory. It grants the user a 15% increase to all damage types, occasionally drops brimstone fireballs from the sky, rains down brimstone fire while invincibility is active, and grants temporary immunity to lava, reduced lava damage, and a 25% damage boost while in lava. Both the brimstone fire and fireballs inflict Brimstone Flames on hit enemies. The brimstone fireballs act almost identical to the projectiles fired by the Inferno Fork, leaving behind lingering red explosions that deal heavy damage.
- The Void of Extinction cannot be equipped if the player is wearing the Void of Calamity accessory, and vice versa.
- Brimstone fireballs deal magic damage and benefit from magic bonuses. However, its damage cannot be increased through any means.
- The brimstone fire has a base damage of 40; the brimstone fireballs have a base damage of 70.