I do have some ideas, but maybe this is the wrong topic for this? I have always wanted to try and defeat Herobrine (who is not real) so why not add portals in Netherholds that can take me to wherever he lives (Nethercore?)
I think that would be pretty cool. Maybe some kind of diamond (the geographic shape, not the gemstone) shaped chamber with lava flowing everywhere. Herobrine would teleport around and drop gravel on you, make blocks disappear from under you, teleport you to different areas like a Mineshaft or on top of a platform. That would be cool. Maybe once you got him down to 1/4th health he would bring you back to the Nether chamber and you would just have a really awesome sword fight.
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Oh hey. Looks like you're reading my signature. That's nice. If you thought I was going to put something funny here, I'm not. I will however put a link to my suggestion about gold tools. I think it's fairly popular. It would be nice if it was added. Just click the link and look at it. Please? I'm desperate. http://www.minecraft...-arent-useless/
Holy toledo , that's a lot to digest. I'm assuming this meant to be a guide to crafting an idea for dimension. An interesting idea and actually kind of fortunate I serendipitously stumbled on to this. Though it was something that was I just thinking of making a topic on an idea for a dimension, just moments ago, so I was looking around the forums.
There's this new mob in 1.13, the Phantom. Which swarms players that have not slept in a long while.
The item they drop is leather, which I think seems it could be something more unique.
Since they are mobs have an affinity for sleep, I thought something they drop could be related and something to help to get to what ever dimension they came from.
I suppose they are not normally from the over world and manifest from somewhere else.
One idea, is they can drop something called a Dream Seed and it can be used as part of a recipe to build a portal.
The recipe can be expensive to make. Also, the Seeds themselves could be hard to obtain, such as a rare drop, more rare than a Nether Skeleton dropping a Wither Skull.
The process to prepare the ingredients could be a long and expensive process, not just materials, but the seeds maturing to a plant that takes more steps than just planting, but needs occasional tending to survive.
The only idea I have for a portal, could be something like the End Portal. Where it takes multiple steps to activate.
The dimension could feature the mobs, a unique landscape and introduce a new mini boss. Not sure what the name of it could be, that wouldn't be generic.
Defeating the mini boss in the dimension could get you a unique, uncraftable item. Something that gives players a new way to play/interact with the world/encounter mobs, would be an interesting incentive to go there.
Perhaps some kind of remote viewing, or object manipulation.
By the way...
It's hard to not resist to shoe horn my own build ideas I've been working on for something similar to this. Perhaps someone can use it.
This new dimension could lead players to world with some sort of ancient, fantasy looking structure at first glance, but it's not just a structure, it's an arcane machine. A huge structure (1000 blocks on the x and z cords and over 200 blocks in the z axis) that spawns in any randomly generated terrain on an island that is otherwise endless ocean. The whole structure is one massive, cohesive 'engine' of sorts.
Not an engine in the conventional sense, but one that looks like an ancient atrium from above the ground. Made of stone, decaying, mossy and hanging vines. Towering pillars, arches, grand steps, spiraling walkways and grand halls. Overall a circular design that's symmetrical. Dome tops, curving walls, long walk ways in the sky that wind around the structure that are on pillars. Surface is in a unique flowering gardens biome. There could be ornate designs, like water features and chandeliers that hang in archways and the ceilings of domes.
The structure at the surface also has evenly spaced towers in a circle around the whole structure that looks like over sized pillars and have spheres on top, that house some kind of power source.
The towers have some kind of tunneling that goes underground, that would act as conduits. There is a 'circuitry' to all these conduits that all converge to power 'engine rooms' deep underground, at 'basement' level. A sub level has water channeling system to cool the engines and vents that lead steam to the surface. There's several engine rooms, one to the north, south, east and west and all send power to a center chamber that is massive. The power of all the engines is sent to one point, on to an ancient relic at the center of the structure and sends a bacon of energy that beams to the sky. Larger than normal beacons.
The signal the beacon sends, summons a boss. The easiest way I can describe the boss is a golem, a giant stone golem. That I was was thinking could be laying dormant and detaches itself from the structure.