Hardcore challenges that scales from other mods and awarded with powerful and unique Vestiges from unknown God-like creature. Has lore progression and a lot of cool stuff like negative enchantments, anti heal, heal debt, shields, over heal/shields, etc.
Inventory Pets are living animated creatures that exist in your inventory and give you amazing special effects, drops, buffs, utilities, defenses, and weapons in exchange for care and feeding.
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.