Arda's Sculks mod is a mod that improves the ancient city in the game and offers the ability to open the ancient portal in the ancient city. This mod adds many deep dark biomes to the game and many boss creatures found in these biomes.
Adds an "infectious" desert to your world (that will not spawn on its own). This desert can also "cleanse" other infections. Contrary to most infection mods you can live in this desert.