GT New Horizons · Space & dimensions
Twilight Forest

The Twilight Forest (TF) is a dimension unlocked in LV that contains new magical ores and a linear progression of dungeons and bosses to defeat. Open a portal to the TF by tossing a quick and dirty portal generator into a shallow 2x2 pool of water surrounded by vanilla flowers. Once inside, obtain a magic map from the Quest Book and use the pre-loaded icons on it to navigate around. Many areas or biomes are initially inaccessible because the bosses must be defeated in a particular order that aligns with the in-game achievements. The TF as a whole remains mostly unchanged in GTNH aside from its ore generation and the uses of some items.
The TF is one of the most important dimensions in the early game. It is the only source of nickel ore when building your first Electric Blast Furnace, the only source of cryolite ore when smelting aluminium to reach MV, the only source of Thaumcraft ores to start wand progression, and the only source of materials such as steeleaf and knightmetal. The TF also offers unique treasures such as Hollow Hills which contain many different ores and mobs, the Timewood Tree which accelerates the growth of crops around it, and a 20 modifier cleaver for completing the main boss progression.
Getting Started
This section explains how to reach the Twilight Forest and provides some tips for navigating the world. At first glance the TF appears similar to the Overworld with a few different types of trees, ores, mobs, and randomly generated structures but there is so much more to find and explore. For the main boss progression, see the next section.
Portal
The TF portal is the only way to reach the TF dimension, but it can be built practically anywhere in the Overworld similar to a Nether portal. Start by digging a shallow pool of water that is exactly 2x2 in size, one block deep, and completely surrounded by grass or dirt. Next, plant vanilla flowers such as dandelions or poppies on top of the 8 blocks adjacent to the water. The portal does not have to be open to the sky and the biome is irrelevant.
Lastly, craft a "quick and dirty portal generator" from 4 LV circuits and 1 diamond in an LV assembler and drop it into the water to activate the portal. The activation is guaranteed to cause a lightning strike at the center of the portal which is normally just a special effect, but it can also upgrade a pig Adventure Backpack into a pigman one if the player is struck while wearing it. The latter provides a permanent fire resistance buff and is therefore highly recommended. The flowers around the portal may be removed after it is formed, but the blocks surrounding it must stay. Otherwise, the portal turns back to water and must be re-activated with another quick and dirty portal generator.
Entering the portal creates a second identical one inside the TF for returning back to the Overworld, again similar to a Nether portal. If that one is ever broken, then use the Quest Book to obtain a new quick and dirty portal generator from resources inside the TF. Another option is using /home fromServerUtilities to instantly teleport between dimensions without ever needing the portal again.
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Magic Map
Upon entering the TF, your very first goal should be obtaining a magic map from the Quest Book under the novice thaumaturgy tab. The magic map is not craftable and therefore can only be earned as a quest reward. The quest requires a magic map focus and a paper stack which together costs 1 raven's feather, 1 torchberries, 1 glowstone dust, and 64 paper. The raven's feather drops from ravens on the surface, the torchberries grow underground in caves, and glowstone can be found on the ceiling of Hollow Hills.
Once obtained, hold the magic map in hand to see all the dungeons and structures within the currently explored area. There is no legend anywhere in-game so use the following as a reference for identifying the symbols. Notice that everything generates in a grid-like pattern and that some structures generate together. For example, there is always four labyrinths surrounding the hydra's lair and there is always four goblin knight strongholds surrounding the dark tower. Exceeding the bounds of the map requires a new magic map which can be obtained from the same quest after a 24 hour cooldown. Defeating any of the bosses marks that location with an "X" to indicate that it has been completed.
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Leaf Dungeons
Leaf Dungeons are hidden inside large Robust Twilight Oak trees. They contain a Swarm Spider spawner and a chest. They are notable for containing rare Twilight Forest Saplings such as:
- Tree of Time Sapling
- Tree of Transformation Sapling
- Miner's Tree Sapling
- Sorting Tree Sapling
Boss Progression
The TF contains a linear progression of dungeons and bosses to defeat. Skipping any one of them is strictly forbidden and enforced by impenetrable barriers to their dungeons/biomes. The barriers only drop after completing all the prerequisite in-game achievements, which typically involves picking up the previous boss' drops off the ground. Fortunately, the bosses are very easy to kill with a strong crossbow and the entire progression can be completed very quickly. Most boss drops or trophies are incorporated into magic progression, such as the recipes for Thaumcraft wands. The bosses do not spawn if the difficulty is set to peaceful.
1) Naga
The Naga is the 1st boss in the TF and found at the center of the Naga Courtyard
. The Naga is a serpent with multiple segments for a body and moves around very quickly. It also breaks walls that it passes through which reduces the amount of cover as the fight goes on. Upon defeat, the Naga drops naga scales which are used for wooden wand cores.
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2) Lich
The Lich is the 2nd boss in the TF and found at the top of the Lich Tower
. The Lich is an undead mage with magical defensive shields around it and the ability to spawn clones of itself and other mobs. Its primary attack is shooting ender pearls at the player which have contact damage but can also be returned back at the boss by left-clicking them in air, similar to a ghast fireball. The Lich is initially invulnerable until all of its shields have been broken which is done by either hitting it with enough of its own ender pearl attacks or physically hitting it with enough sword strikes. Upon defeat, the Lich drops lich bones which are used for greatwood and amber wand cores.
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3) Minoshroom
The Minoshroom is the 3rd boss in the TF and found at the bottom of the Labyrinth
. The Minoshroom is a unique type of minotaur that charges at the player with a diamond axe and deals very high physical contact damage. The Labyrinth is effectively a maze with 2-3 layers filled with various mobs and loot. Digging down to skip to the very bottom layer is not recommended because it is typically blocked by bedrock and/or extremely slow. Upon defeat, the Minoshroom drops its axe and several meef stroganoff.
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4) Hydra
The Hydra is the 4th boss in the TF and found at the center of the Hydra's Lair
. The Hydra starts with three heads but dealing too much damage to any one of them causes that head to split into two, increasing up to around seven or eight heads in total. The Hydra's primary attack is shooting fireballs at the player from each individual head. It is recommended to target the Hydra's body which still does damage to the boss without increasing the total amount of heads. Upon defeat, the Hydra drops fiery blood which is used for RBOIQBT, silverwood, bloodwood, livingwood, witchwood, void, and necromancer wand cores.

5) Knight Phantom
The Knight Phantom is the 5th boss in the TF and found within the Goblin Knight's Stronghold
. The Knight Phantom is split into six different entities each equipped with its own unique weapon. All six must be killed for the boss to be defeated. The entrance to the dungeon is unlocked with any trophy of the previous bosses and the boss room can be found anywhere within the dungeon, including behind random walls. Upon defeat, the Knight Phantom drops enchanted knightmetal weapons and amor.
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6) Urghast
The Urghast is the 6th boss in the TF and found at the very top of the Dark Tower
. The Urghast is a very large and powerful ghast that shoots three fireballs at a time at the player. Attack the Urghast with a ranged weapon and/or use the ghast traps around the top of the Dark Tower to lock the Urghast in place. Upon defeat, the Urghast drops carminite and fiery tiers which is used for silverwood, primal, tainted, bloodwood, infernal, and witchwood wand cores.
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7) Alpha Yeti
The Alpha Yeti is the 7th boss in the TF and found at the center of the Yeti Cave
. The Alpha Yeti primarily does physical contact damage to the player, although it can also pick up and throw the player around. Upon defeat, the Alpha Yeti drops alpha yeti fur which is used to craft yeti armor.

8) Snow Queen
The Snow Queen is the 8th boss in the TF and found at the top of the Aurora Palace
. The Snow Queen attacks by spawning ice crystals, blasting snow at the player, or by trying to smash/ram her ice chariot into the player. The Snow Queen is invulnerable to attacks from below and must be hit from above or with a ranged weapon to take damage. Upon defeat, the Snow Queen drops snow queen blood which is used for ichor woven silverwood wand cores. The aurora blocks that make up the tower may also be electrolyzed for helium and helium-3.
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Cloud Cottage & Troll Cave
Although there are no more bosses after the Snow Queen, there are still two more areas to explore afterwards. The first is the cloud cottage which sits high above the surface outside the final castle and is home to a few giants that take the skin of the player. Upon defeat, they drop the giant's sword and giant's pickaxe. The latter is used to break into the "final" area or troll cave vault which sits directly below the cloud cottage deep underground. Inside the troll cave vault is some loot and the last obtainable item in the TF, the Lamp of Cinders (LoC).
The LoC is designed to remove the thorns around the final castle by right-clicking the air, but there is no final boss or any particular reason to enter the castle. Therefore, the LoC marks the end of the Twilight Forest and can even be traded into the Quest Book for a reward: a 20 modifier cleaver that is perfect for obtaining wither skeleton skulls and therefore nether stars. The LoC quest can be found on the kill all the things tab of the Quest Book but it is initially hidden until the Snow Queen is defeated and the item is held in the player's inventory.
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