Unreleased Features

This is the unreleased features of Caves and Cliffs Revamped

Sculk

 * The Sculk Block was shown.
 * A unnamed sculk block was shown, Nicknamed the "Sculk Trap".
 * Another unnamed sculk block was shown, Nicknamed the "Sculk Chute".
 * Sculk Veins was shown.
 * A leaked screenshot showed the sculk blocks in the redstone tab implying that they have redstone uses too.

The Warden

 * The Warden is a mob shown.
 * Spawns in the new deep dark biome.
 * The first fully blind mob (bats, despite relying almost exclusively on echolocation, still have basic eyesight).
 * When sensing movement, it moves toward the source of the movement.
 * It follows and attacks players, mobs, and other entities that make vibrations.
 * It does not attack other Wardens.
 * When attacked, it path finds toward the player.
 * Seems to follow the same rules as the sculk sensor when detecting noise.
 * When it detects a vibration, the growths on its head rattle and light up, similar to the sculk sensor.
 * If any projectile (e.g. egg, snowball, arrow) lands near the Warden, the mob inspects the location where the projectile landed, due to the projectile creating movement and noise. This feature can be used in order to cause a distraction.
 * Does not detect players that are sneaking.
 * Can detect players that are invisible.
 * When aggravated for long enough, the warden follows the player continuously, regardless of any other distractions.
 * Incredibly strong, doing 30 damage which is 15 hearts of damage, bringing players wearing full netherite armor from full health to 7 health points.
 * A mob designed to be extremely difficult and fled from.
 * Has a way to counter the strategy of building up 3 blocks to avoid attacks.
 * At least as fast as the player's walking speed.
 * Seems to have knockback resistance.
 * The warden's chest has a glowing core that appears to brighten and dim in tandem with the ambient lighting of the deep dark cave biome.
 * The core creates a low throbbing sound as it pulses. The sound and animation seem to speed up rapidly when the warden notices a player.
 * Is about 3.5 blocks tall, making it one of the tallest mobs in the game, exceeding the iron golem and enderman in height and width (the same).

Biomes

 * The Deep Dark was shown off.
 * New biome at the "deepest depths of the world".
 * Wardens can spawn here.
 * Contains sculk blocks and sculk sensors.
 * Contains deepslate.
 * Likely generates within the deepslate layer between -1 Y and -64 Y.
 * May contain candles.
 * While in the deep dark cave biome, the ambient lighting occasionally dims temporarily, limiting the player's visibility. This serves as a warning that the warden is nearby.
 * The Mesh Caves was Shown off.
 * Seems to be possibly a large tunnel-like cave generation.
 * Not much is known about this cave variation yet, but it was confirmed on Twitter by Ruby.
 * Possibly contain "catacomb" style branching cave sections.

General

 * More extreme and smooth terrain.
 * Likely some changes to the generation of alternate stone types, to make them appear in larger but less numerous deposits.
 * Possibly seen in a screenshot tweeted by Ruby, in which diorite appears to generate in a long and flat horizontal strip, rather than a small unevenly shaped patch.
 * Ore generation further rebalanced, and influences the surrounding stone.
 * Rare large ore veins.
 * Lush Caves and Dripstone Caves will generate in normal worlds.

Clay Pot

 * Uses the texture of clay.
 * Ceramic Shards can be incorporated into an unfired pot.
 * Can be fired by lighting fire under the pot.
 * Pot can fit up to 8 Ceramic Shards.

Painted Clay Pot

 * Uses the texture of terracotta.
 * Created by firing a clay pot.
 * Upon firing, any placed Ceramic Shards become permanently incorporated on to the clay pot.

Processing Rubble

 * A technical block associated with archaeology.
 * At least comes in dirt and gravel variants.
 * Created upon using a brush on what appears to be normal dirt or gravel.
 * Has 16 layers
 * Does not have a official name at the moment.

Brush

 * Used to sweep away debris from archaeological items.
 * Sweeps debris off archaeological items one layer at a time. If interrupted, the block it was being used on simply disappears, and does not yield custom block heights.
 * Also comes in a blue-green variant.

Ceramic Shards

 * Obtained with a brush at archeological sites.
 * Come in different colors and different designs, each depicting a different picture, such as an ender dragon, a cow, Alex, a skeleton, a tree and a vindicator.
 * Can be placed/customized on clay pots.
 * Currently using placeholder art, according to Ruby.

Archaeology

 * The player can find items and blocks in gravel and dirt inside the dig site structure by using the brush.
 * Possible items shown in the preview footage include: Ceramic shards of varying color that depict different images, Diamond blocks and emerald blocks.