Wiki - Structures + progression path

Trial room

Hidden in the underground lies one trial chamber-like room.
Doesn't feature any of the custom enchants.

Runic fracture

A flying island that you get into by looting a part of the asflors village.
Features an ominous traveler key for opening the asflors village ominous vault, as well as a secret entry to the runic dimension...

Scorched below

Beginner level loot and mobs.

Shrines

They go by tiers (Tier VI on the picture), and from Tier V up, you can get the ominous vaults. They are "smaller trial chambers"

Pale residence

Overgrown set of buildings all full of creakings and zombie villagers

Stray fort

Structure full of strays and their arrows... At the end you can find a map to the lone citadel

Stray outlook

A structure full of strays and their arrows, loot suitable for beginners

Swamp village

A village full of witches

Illager hideout

The illager structure that lies underground. Has usual pillager loot, also features zombie villagers you can cure for an advancement, but they sell the illager's bane enchantment.

Lone citadel

One of the largest structures in game, has a lot of mobs, the loot includes various things, most of them for beginners. Also features the Might book.

Tavern

They have many types and they are in every biome except the ocean. The cartographer inside can give you a map to a few structures. (on the right you can see a part of another structure: Asgard)

The Alfheim tree

These gargantuan trees are a test of strength before entering the Runic dimension, their main loot is enchanted books, shulkers and some other useful junk. From the vaults you can rarely get spawn eggs: witch, iron golem, breeze.

Steeles

All around the world, they include one divine key trader and a map to the structure they belong to.

Arena

Has a few zombies, then drops beginner-level loot, and also some mellohi, cat, blocks, chirp and strad disks.

Illager manor

Has a lot of illagers inside. You could even say it's a bigger mansion. The loot is mostly consisted of totems.

Chanterelle crypt

Overgrown cave systems with non-difficult mobs and with loot for beginners.

Village of Asflors

It is a very peaceful village. The loot is made mainly out of enchanted books, but also other useful junk. By reading the story, you'll get to the Runic fracture and later discover where the Sword of Asflors is.

Witch villa

A structure found in swamps. Witches use it as their luxurious resort, where they make potions with many ingredients which you can find there. Antidote enchanted chestplate is recommended to use here.

Asgard

Everything you have gotten from previously looted structures needs to be used here. It has many strong mobs, but features many things: Gungnir, Zyask's strike ,spawn eggs (depending if you have the bad omen effect or not, you get): normal: enderman, zoglin, zombie, pig, Asgard guardian (zombie version) Ominous: zombie, husk, wither skeleton, Asgard guardian (Both wither skeleton and husk versions), evoker, piglin brute. From the normal vault, you can get enchanted books including Frost, and spawn eggs: cat, wolf, and RARELY, you can get a trial spawner.

Echoing forge

Has a lot of mobs, the loot is diamonds and some other useful junk, but most importantly it features the Gea's gift book. It has a few types/parts: deep dark part, nether part and the pale part. If you stumble upon the pale part, you can get protection V leggings as well (Warning: rare).

Badlands miner outpost

Has a lot of gold, iron and TNT inside. It is filled with pillagers, vindicators and other illagers.

Toxic lair

This is the lair of the witches, it's filled with spiders, bogged and the stench of poison. Features both Blowthrough and Tri-shot books.

Mangrove witch hut

Just as useful as an ordinary witch hut

Desert ruins

These buildings are filled with sand and a few traps too. Features an Outreach enchantment book.

Trident trial monument

A way bigger ocean monument, has a Mini-boss fight and a guaranteed trident from the vault on the top. You can also repair the conduit in the center.

Vanaheim

Large underground structure with the entrance on the surface. Contains enchantments: Weakening sting, and all of the "blessing" enchantments, such as: Kuec's blessing, Zyask's blessing, Evoker's blessing, Ocean blessing. A warden guards the center room (on the picture).

Helheim

Large underground structure with the top having a glass dome. Contains enchantments: Nugrak's bite and Bright vision. The main puzzle leads to the Rune of Reva.

Towers

There are a few types of towers, the only difference is their look as they all contain the same beginner level loot and a map to some structures.

Ashen gallery

Medium sized underground structure. Beginner-intermediate level loot.

Cat town

The only things that are precious here are the cats, low-none loot here.

Castle

Medium sized structure, has beginner level loot and mobs. Very good for people with full iron gear.

Illager barracks

Medium sized structure, illager outpost type of loot. Also can give a map to an Illager manor.

Nether Port

A structure filled with blazes. Can have wither coated books.

Piglin hamlet

A structure filled with piglins and their wealth

Piglin camp

Can have maps to other nether structures and other small amounts of nether loot

Piglin Donjon

A giant structure filled with piglins and their wealth, has a lot of netherite.

Piglin outstation

A structure filled with piglins and their wealth

Nether keep

"Giant nether fortress", has a lot of nether-related loot

Skeleton tower

Can have maps leading to other structures and wither skeleton heads.

Skeleton camp

Can have maps to other nether structures

Piglin camp colony

Can have maps to other nether structures, it looks like a bigger piglin camp

Sealing Halls

Monstrous nether structure filled with ghasts, skeletons and blazes. Main loot is ghast tears, iron, gold and other nether items + enchanment books: Hydro veil and Swift soar. Has a Mini-boss fight in the main room.

End Castle

A monstrous structure filled with shulkers and phantoms, features many end crystals, end city loot and gravity books. Inside the ominous vaults, you can get an elytra.

Lone ship

You can get end city loot and an elytra

End lighthouse

You can get many shulker boxes and end city loot, along with a map for the end castle

Runic crystal

Functions as a gateway to the Overworld. Inside the crystal, you can find the apple of Era.

Dokkalfar ruins

Beginner level loot, functions as a gateway to the Overworld.

Cuboid

Small flying structure with fast and strong mobs. They are a bit stronger than in the Runic labyrinth.
The main loot is a Life Steal 1-2 book

Runic Labyrinth

Mobs are a bit more difficult than they are on the Alfheim tree, but the loot is much better and the rooms have way more strategy needed to loot them. The ominous vault can drop many things including netherite, blaze, mooshroom spawn eggs, heavy cores, or the Twilight of Yggdrasil bow.
Per each labyrinth, there's one Dark Elven bow hidden away to be found.

Progression path

You start by getting full protection IV netherite armor. Then you can move on to getting the Asflors sword, by finding and exploring the Asflors village and finding the necessary books to guide you on the way to the main loot.

After getting the sword, you can test your strength in the Alfheim tree. If you trust yourself that you can loot it with ease, go to the runic labyrinth, featuring many more mobs and two more items to get: The Twilight of Yggdrasil bow and the Elven Bow.

When you get those, you move on to the overworld, now you need to get spiteful 3 on your sword and probably traveler 3 on your boots, along with Poison aspect for your spear and/or sword. You need to explore to find those, they're not 100% guaranteed anywhere.
Then you explore and find the Echoing forge, where you get the Gea's gift II enchantment. Get a full set with it.

While within the Echoing forge, you might get protection V pants from the forge's pale part chests. You can skip this step, but it's safer to have a larger protection than not.

Additionally, you can get Life steal books from the Cuboid vaults. If you have this, skip getting Nugrak's bite on the weapons you use Life steal on.

Then you move to Vanaheim, where when you loot the structure completely, you should get a book of Weakening sting from the ominous vaults there, enchant your ranged weapons with it. Speaking of ominous vaults in Vanaheim, there is a special type of enchant group called "blessings", choose whichever one you like and put it on your sword or/and axe. After that comes the time to get Bright vision from Helheim, along with Nugrak's bite on your sword and axe.

Now it's time for the hard part, the part where you're going to loot Asgard, where you can get Gungnir, but you can also get your gear lost very easily, proceed with caution. You can also get Zyask's strike and Frost within the structure.
After that, enchant your Gungnir with Weakening sting.