Antimatter

Strange physics

Anything you bring here and set down annihilates.

At a glance

Kind of world	Strange physics
Native Serum stand-in	None: bring spare Serum
Quests	None

Screenshot comingantimatter-arrival

Magenta hills and an orange sea under an amber sky full of stars, the weathered arrival Box on the shore

What happens when you arrive

It looks like home, turned inside out. The hills and valleys have the Overworld's shape, but the grass is the colour of a bruise, the sea is orange, the sky is amber, and the stars never go out. Underfoot the ground hums like two magnets held the wrong way. Before you do anything else, know this: nothing you brought with you can be set down here.

The rule: foreign matter annihilates

Any block placed here that was not made of this world's matter vanishes the next instant in an explosion, a little smaller than a block of TNT, and you are told: "That was not made here. This world will not hold it."

What blows up	What is safe
Torches, lanterns, crafting tables, chests, beds	Antistone, the black bulk of the world
Cobblestone, planks, dirt and anything else from home	Antisoil, the purple ground
The lab machines	Antimatter Ore
Blocks placed by mobs, too	Antimatter Lamps you craft here
	The Box's own panels, door and core (you can repair the Box)

So: no walls of cobble, no torches, no bed. Build only with what you dig up here. Items in your inventory are fine; it's placing them that's the problem.

Screenshot comingantimatter-crater

A small crater in the magenta grass where a torch used to be, smoke still rising

Light and shelter

The only light you can safely set down is made from this world:

• Antimatter Ore glows on its own. It runs through the antistone from the bottom of the world up to about Y 120, in small veins, and needs an iron pickaxe. It drops Antimatter Shards.
• Antimatter Lamp: four shards around a block of antistone.

➜

Antimatter Lamp (Crafting Table)

For shelter, dig in. Antistone and antisoil drop themselves and are safe to build with.

What lives here

Rabbits hop about the magenta meadows, and Endermen walk at night. Endermen belong to no world in particular, and the blocks they pick up here are this world's own, so they don't blow up.

What to bring home

Find	Where	Why it's worth it
Antimatter Shard	Mine Antimatter Ore.	A coolant for the Cryo Stabilizer back home: it runs without ice. Also makes lamps.
Antistone, Antisoil	Everywhere.	Strange-coloured building blocks.
Antimatter Lamp	Crafted.	A glowing block.

Serum and getting home

• The arrival Box's cache holds 3 Serum Ampoules, more than most worlds, because you can't set up a lab here: the machines would explode.
• Native stand-in: Antimatter Shard. Right-click it into the Cryo Stabilizer and it runs without ice, but you'll have to use it at home.
• Your only way back is the cached Serum, so don't waste an ampoule.

Tips

• Empty your hotbar of blocks before you arrive, so a stray right-click doesn't cost you a heart or two.
• Bring an iron pickaxe: it's the only way to make light here.
• If the Box gets damaged, you can patch it with Box panels from home without them exploding.
• No bed means no skipping the night. Dig a burrow in the antistone and wait it out.

Birds

Birds you can photograph for your bird log here. Open one to turn it round, watch it move and hear its call.

• Negative Heron: common
• Positron Finch: rare

Everything this world adds

5 blocks and items (click to open)

Antistone

Antisoil

Antimatter Ore

Antimatter Lamp

Antimatter Shard

The traveler's tape

Every arrival Box has a chest by its door holding a cassette: the last traveler reading their journal of this world aloud. This is what they say. It gives a lot away.

Read the journal (spoilers)

The sky here is amber, the sea is orange and the grass is the colour of a bruise, and the stars never go out. I set down a torch on my first night and it went off like a charge of powder; so did the cobblestone I tried to wall myself in with. Nothing from another world can be set down here: it annihilates the instant it touches this world's ground, and the crater is all that is left of it. What this world is made of is safe, the black stone, the purple soil and the glowing ore, and four of its shards around a block of stone make a lamp that does not explode. I could not brew a thing, so I lived on the ampoules cached in the weathered Box; it is the one made thing here that does not mind which world it is in.