I would just read the Minecraft Wiki, it's free and has everything you really need to know.

While I don't have any objection to the actual event, what I do have a slight objection to is this possibly being straight from terraria.

Did you think of this yourself and it happen to also be a thing in Terraria or was it inspired by it? Either way, sounds like a cool idea but I'm not completely sold on it yet,

Partial Support

FULL SUPPORT

It always irked me that mojang added new blocks without slab/stair variants.

Pokemon + Minecraft = awesome

Holy stinking moly these are cool

Ravenholme

Town of Tablen

Pleinlac (plain-lack)

I haven't even heard of a single case of Mojang enforcing their own EULA.

Do NOT use the words
Craft
Network

or

Did I already say Craft? DON'T USE IT!

Also, I would consider changing your server entirely, because their already hundreds of faction RPG servers with "unique" elements. you're entering an over saturated market.

Quote from GuyInJeans»

Pokemon + Minecraft = awesome

Thanks, also just so you know im waiting for a few more ideas beafore i pick, but i am very gratefull for you taking time to reply <3

Have you ever...
- Stumbled on a cave.
- Killed all of the terrible creatures and hope not to die of an arrow to the knee, magma-gefallen or a heart attack.
- Waited. Left turn or right turn now? or in that small whole a little up?
- Oh my god was that a spider?? ACK-wha-was-that-its-one-block-high-and-grey!
- Hey!! Diamonds!! [tssss] Goshdarnit a mourner-fleeking creeper of my ace just killed me FROG! Quick! Get back all the stuff!
Sadly, once you've seen a cave, you've seen them all.

So people go for the other option. Branch Mining.
Nothing wrong about that. But Gain/Effort is not currently well balanced.

Well, let's make cave exploration more appealing with a Spelunking Update.

By the way, all proposed "event-like" idea must have a rare chance of happening so to keep the surprise great.

Harder stone near bottom
Original idea of the thread. Either a question of physique or a new stone altogether to force people to go in caves.

Obsidian pocket near bottom
Goshdarnit I can't strip mine properly. I guess I should go in caves instead.

Stalactites
What says cave more than this? No use, just decoration. You're just not nice to Mother Cubic Earth when you break them.
They grow overtime where water drops from stone ceiling.
Walking on/touching small stalagmites/stalactites breaks them.
Data value wise, they have 0 to 7 for height and girth, and +8 represents a stalagmite (the one at the bottom growing up).

New minerals at cave sides
What are you waiting for, just mine me!
I may be only for decoration, or in a potion recipe,
But what is certain, is that I am pretty!

Harlp marh!
Was that a villager surrounded by fences I heard?
"Yearh! Stehrve!"
Well, there is a fleet of zombies around you I must get rid of,
Before seeing if your exchanges were worth this rotten flesh gathering.

Nether-gate ballroom
Ok maybe forget the ball, but a rare well guarded room with a already working portal to the nether could be nice!

Better disaffected mines
More chests, occasional resting room with a bed or two.
Something that gives the feel that somebody worked there fifty years ago.

It's a secret to everybody!
The rare passive aggressive mob.
Exactly the same look as their zombie, pigman, creeper, skeleton, enderman friends, aside from friendly googley eyes.
They have the heart and exchanges of a villager, in their own little room aside from the caves. They whistle sometimes.
Nowhere else found than in darn caves.

Mazes and dungeons
Why so much obsidian right here? What is this the entry of? Left or right now? FROG I'm lost. Mommy

Poisonous gas in stone
Pwah! What's with the this air oh gosh I'm dizzy. Or dying. Not sure.
Poison-effect-causing air in small pockets to hinder strip mining.
Data value of 1 to 7 for dissipation to air block until 0 where it becomes fresh air again,
The 8 bit on or off for a light (upward) or heavy (downward) poisonous air.
Green with envy.

Change Diamond spawn rate
So it's common but small veins in hard stone and rare but big veins in caves.
Both the strip miner and the cave explorer are much merrier!
Or only found near lava
Or well no change at all

Silverfish, you're stronger than before!
Yeah, I'm a badass now. You might as well stick to caves and leave me alone dear.

More decorative stones
You can almost feel with your fingers the humid and porous rock from the thousand years old walls with the new limestone variant.

More cave shapes
What about thin ravines? Sharp pits? Senotes?

Please vote for the ideas you like and propose your own ones!

Show your support

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Quote from GuyInJeans»

I think he means his MC lags a lot, OP (original poster) for starters, did you buy the game from Mojang? Secondly, does your game stutter and not play smoothly? There have been reports that even higher end PCs (like yours, looking at your specs) are having trouble running the game due to optimization issues.