The Furlet Update - An Underground Civilization & Tameable Cave Guardians

Furlet Caverns & Ancient Anvil
A small pocket biome (size of an Amethyst Geode) hidden behind 1-2 block wide openings in standard cave walls. It features a cyan/azure ecosystem with unique glowing vegetation. At the center lies the Ancient Anvil, an indestructible block in Survival. Clicking it opens a UI requiring a Compass and local foliage (harvested with Shears) to forge an Ancient Compass. Alternatively, giving a Compass to a Furlet makes them walk to the anvil and forge it for you.

Mob: Furlet
Small, cyan cave creatures (0.6-1.0 blocks tall) with 16 HP and 1 DMG. They are neutral but attack in packs if one is provoked. Naturally slow, they gain massive speed when hostile, making swarms lethal. They drop a Furlet Ear, used with a Bowl and Carrot to craft a Furlet Stew (grants a Speed/navigation buff).

Ancient Village & Ancient Furlet
The Ancient Compass points deep underground to a massive cavern biome featuring wooden huts: the Ancient Village. It is inhabited by Ancient Furlets, larger and fluffier versions of the standard mob (0.8-1.6 blocks tall) with 24 HP and 3 DMG. They are neutral and do not pack-fight. They can be tamed using the foliage from Furlet Caverns to fight hostile mobs. Players can make them stay/sit by using Shift + Right-Click to secure them.