Materials:

Resin

Obtained by burning logs on a campfire as a side product or dropped by Gredwarves.

Used to create instamineable blocks that turn Bonemeal into more Resin , twice as poweful Coal or to convert slime into Ooze.

Ooze

Dropped by Oozers or made out of Resin and slime.

Used to make instamineable pass through blocks that stop liquids and Golem Effigies that spawn Ooze Golems.

Combine with sugar and Thistle to make edible Jellos or smoke in Smoker to turn it into Slime.

Ancient Iron

Found in the Brown Mud that can be found in Swamps (and Mangroove ones) or crafted from Mud and Dirt.

Used to make Ancient Steel.

Surtr Shard

Dropped by surtlings or made out of Blaze Powder and Amethyst.

Used to make 4 times as powerful as normal Surtr Coal, Crude Steed Surtr Cores.

Surtr Cores

Crafted from 8 Surtr Shards and Coal.

Used to make Raw Steel, Steel Refinery, Heavy Steel, Heavy Steel Upgrade Templates

or to convert Slime/Ooze into Magma Cream and Gunpowder into Blaze Powder.

Thistle

Found in Swamps or really dark Forests/Taigas

Removes poison from Ooze and Draugr Intestines to make them edible. Glows.

Mobs:

Greydwarves

Hate undead and players, drop Resin, Cobblestone and Oak Wood.

Appear only in the darkest Forests.

Boars

Neutral, drop Raw Pork and Leather Scraps (use two to make Leather)

Tamed and bred with mushrooms and berries. Tamed won't follow you but will

aid you in battle when they see you fighting.

Draugr

Melee or Ranged undead swamp warriors, drop Entrials that can be turned into Sousages.

Oozers

Yellow small slimes, don't jump but shoot. Drop Ooze.

Surtlings

Make Nether really dangerous. Cast Fireballs and drop Surtr Shards.

Ooze Golems

Created with two Blocks of Ooze, 6 Ooze and a Pumpkin. When fed with Ooze become

your loyal Body guards that follow you very closely.

Steelworks

Create Ancient Steel out of 2 Iron Ingots, 2 Coal, 2 Ancient Iron and one Surtr Core.

Smelt in a Blast Furnace to obtain Ingots.

To further create Steel it is advised to craft a Refinery out of 4 Obsidian, Surtr Core and

4 Ancient Steel.

Crude Steel requires one Ancient Iron less and Surtr Shard instead of Core but it has to

be processed in The Refinery.

Use Ancient Steel to make blocks, Doors, Pressure Plates, Anvils, Hoppers and Cauldrons as

these recipes now need Steel and not Iron.

Steel Plate mail is a piece of Armor with power of Diamond and has bigger knockback resistance

but slows you down. Warhammer is a slow but deadly weapon and Great Hammer excavates

multiple blocks. To make them use powerful Ooze and Resin upgraded Sticks.

Combine Block of Steel with Block of Coal and Surtr Core to make Block of Heavy Steel.

Used to make Smithing table and to upgrade Crossbow and Netherite Pickaxe

into Repeater and Matoock, powerful tools of destruction using Steel Smithing Templates

made out of 7 Ancient Steel Ingots, Surtr Core and Netherite Upgrade Template.

Valheim and Steelworks