The Void is a new dimension only accessible in Hardmode. The Void holds content such as Items, Enemies, Bosses, and more.
Access
The Void can only be accessed by using the Mind Seal on the Mind Portal.
Biomes and Structures
The Void has many Biomes and Structures.
Biomes
Void Plains
Warped Woods
Rune Lands
Mountains of Madness