This is a really basic Mod and not finished!
Most Items are not in survival archivabel.
The mod adds various items like:
Void diamonds: craftable into void diamond blocks
Void goo: craftable into VOID
Void Staff: turns some blocks (like stone) into void blocks
Void altar: turns items thrown on top into void items (diamonds -> void diamonds, ...)
Void berry: a berry that when consumed gives high saturation but a 50% chance of getting the darkness effect
Ores: ore blocks for void goo and diamonds (deepslate, normal)