Arda's Sculks (Deep Dark Dimension)

1.4.2:

Improved creeper animation. It is no longer necessary to break sculk vines to open the Ancient Portal. The textures of the Sculk decoration blocks have been updated. A new layer level has been added that occurs on negative floors, and new mines and plants specific to this layer level have been added. Added new biome: radioactive balsa forest and new tree species. Added new machine, Deepslate Crafting Dispenser. New decoration blocks have been added. New boss radioactive warden added. Finally, parts like the radioactive Sculk arm and Sculkerite hammer were added.