New Deep Dark dimension

The portal in the ancient city can now be opened with the "skulk lighter" made from the warden's heart, obtainable throught killing the warden.

It leads to the "skulk dimension", that has skulk mobs, as well as a  new boss, like the "skulk reaper". It has also new biomes, some structures with op loot and new ores that you can craft the "skulk armor".