Primordial Caves

A lush prehistoric jungle-cave full of dinosaurs, fossils, and amber. The most iconic Alex's Caves biome.

Creatures: Tremorsaurus (a roaring tyrannosaur), Grottoceratops (a horned ceratopsian), Vallumraptor (a pack-hunting raptor), Subterranodon (a flying pterosaur), Relicheirus, and the massive sauropod Atlatitan. The biome boss is the Luxtructosaurus, and the world-ending Tremorzilla can be summoned as an endgame threat.

What you get: fossils and amber (which can preserve items and mobs), limestone building blocks, Dinosaur Nuggets (a food), and prehistoric spears (Limestone Spear, Extinction Spear).