Caves & Cliffs was too much content
Had to split it in two parts and
That don't mean that things are lacking
On the contrary

Let's head into the caves
Ore textures have changed
Gold and iron now drop ore
And we've got copper

Smelt the ore, craft it into a block
Place it down, watch it oxidize, or scrape it all off
Back to brown, wax it with honeycomb
Make it stop oxidizing; use stairs and slabs, then you're vibing

If we go deep enough
We'll find a new block called tuff
Ironically it's quite weak
But who am I to judge?

Also down deep's deepslate, it keeps safe
Ore variants 'cause it takes
Twic? the time to mine, but I don't mind, 'caus? I'm
Loving all these variants that deepslate brings

Dripstone growing all around
Stalagmites coming up from the ground
Stalagmites can be a threat
Break the block above and watch your head

Just be careful not to fall
They'll do extra damage, your friends will LOL
They'll also drip lava or water into cauldrons

Amethyst geodes
In smooth basalt and calcite
Amethyst buds grow into clusters that give off light

Break them for shards
To craft tinted glass
You can see right through
But it won't let light pass

Ride a minecart underwater
Though it goes a little slow
There's a new squid floating by
Oh, and it glows

Use its ink to make text pop
And show off what you wrote
What's that thing jumping on the mountain
Oh, it's a hecking goat

Make a spyglass
Zoom right in
Item frames can be glowing

Blocks of raw metal
Lightning rods
Glow lichen, I'm liking

Spectate sees through lava
Mineshafts have supports
There's light blocks in Java
But first...

Disclaimer
These next several things, while awesome, may be only partially implemented into the game and either require special commands, special world types, experimental gameplay, trading, finding items in loot chests, and or other means
Now, back to your regularly scheduled update song

Glow berries growing on cave vines
Lighting up the underground
Freeze your butt off in powdered snow
It's the snowiest snow around

Wearing leather keeps you warm
Leather boots will give you grip
Azaleas and hanging roots
Candles make your birthday lit

Sculk sensors
Spore blossoms
Dripleaf will drop you on your bottom

Moss blocks, carpets
And a bundle, like a
Magic bag of holding

Well, just look at that thing right there, it's so cute. What is that? Some kind of water lizard?

Well, thanks a lotl axolotl
Fighting water mobs if they're friendly or they're hostile

Axolotl, thanks a lotl
Carry in a bucket, like my genie in a bottle

Thanks a lotl, axolotl
Swimming and-a walking, they can surely do a lotl

Axolotl, I wanna cuddle
When you're playing dead and regenning in the water

Thanks a lotl, axolotl
For giving me regeneration when I killed your hostile

Axolotl in a puddle
It's Minecraft's first amphibious mobl

Thanks a lotl, axolotl
Be sure not to dry out when you're out of water

Axolotl, I love it a lotl!
I wouldn't ban you from my server if your house was cobble

Just look at its face
And doing zoomies in the water
Breathing in the air and smiling like no other

I guess I'll leave this song on a cliff