The Voidshard Abyss

Voidshard Abyss adds a new late-game dimension filled with dangerous biomes, hostile mobs, and rare resources. Discover hidden dungeons, powerful loot, and atmospheric visuals that make every step into the Voidshard Abyss a challenge.

If you want to have an endgame challenge then this mod is for you.

This mod is still in alpha and only has the dusk shade as a mob added.