Throne and Liberty

Behind Nix — the bosses beyond the eternal ice

Fellinex and Vulcanus in the co-op dungeons, the mounted Arch Boss Ramux and the Colossus Vegamor — a 200-meter battlefield that walks.

PvEArch BossDungeonPvPImpact High
Published on May 27, 2026
Source: Official behind-the-scenes · playthroneandliberty.com
Reading · 9 min
Ramux and the Atirat mount in flight over Nix — the Arch Boss arriving in July
Ramux and the Atirat mount in flight over Nix — the Arch Boss arriving in July

Quick summary — 5 key points

Tap each seal
Fellinex

Colossal mechanical cat in the Stone Grave Cradle dungeon, inspired by a cat tree

Impact · Medium
Vulcanus

Abomination fusing a wild beast with an Ironclad Beetle in the Frostbreath Cave

Impact · Medium
Arch Boss Ramux

Fights in sync with the Atirat mount and goes into a frenzy when the mount falls

Impact · Critical
Colossus Vegamor

Brand-new category (Terra Boss): ~200 m that you climb to destroy part by part

Impact · High
Lore in the Codex

Extra Codex and Collection Codex bring the story of Ramux and the dragon Atirat

Impact · Medium
CHAPTER 01

Fellinex — the cat of the stone grave

Dungeon

Nix's first co-op dungeon is the Stone Grave Cradle, and its boss is Fellinex — a giant's mechanical pet cat.

The studio says the inspiration came from a cat tree — that hidey-hole, the tower with a den where the animal tucks itself in. The setting is frozen machinery still running after centuries, and the design priority was keeping the boss's movements intuitive, with feline behaviors woven into the fight.

Fellinex upright in the frozen machine hall of the Stone Grave Cradle
Fellinex upright in the frozen machine hall of the Stone Grave Cradle
In pounce position — the feline patterns become an attack telegraph
In pounce position — the feline patterns become an attack telegraph

Fellinex — Stone Grave Cradle

Co-op dungeon boss
+ Dungeon boss
Giant robot cat in a fortress of frozen machines. The patterns mimic a feline — it stalks, it pounces, it backs off. The team focused on readable telegraphs so the group reads the attack before the leap.
CHAPTER 02

Vulcanus — the abomination of the frost breath

Dungeon

The second dungeon is the Frostbreath Cave, with the atmosphere of a Living Ice Cave — deep blue tones and evolved versions of the Ironclad Beetles.

Waiting at the end is Vulcanus: an abomination that fuses a wild beast with an Ironclad Beetle. The team designed the boss to be a majestic, intimidating colossus, fitting the cave's mood.

Frostbreath Cave — the Living Ice Cave in deep blue tones
Frostbreath Cave — the Living Ice Cave in deep blue tones
Vulcanus — beast and Ironclad Beetle fused into a single carapace
Vulcanus — beast and Ironclad Beetle fused into a single carapace

Vulcanus — Frostbreath Cave

Co-op dungeon boss
+ Dungeon boss
Beast-and-Ironclad-Beetle hybrid, armored and with a blue energy core. The cave evolves the common Ironclad Beetles up to this armored boss at the bottom.
CHAPTER 03

Ramux — the mounted Arch Boss

Arch Boss

The new Arch Boss is Ramux, the Dragon Knight. And her greatest trait, in the studio's words, is coordinated combat: Ramux fights in sync with her exclusive mount, Atirat.

The shift in philosophy is the key point. Before, an Arch Boss demanded absolute group cooperation. Here, the design lets each player's individual style become part of the fight naturally — less rigid choreography, more personal reading.

Ramux and Atirat — the knight and the skeletal dragon that fight as one
Ramux and Atirat — the knight and the skeletal dragon that fight as one

Ramux + Atirat mount

Coordinated combat
+ Arch Boss
Two targets in sync. The knight and the dragon attack together — and the strategic destruction of parts from classic bosses still stands.

Design philosophy

Individual style becomes part of the fight
▲ Less choreography
Mandatory absolute cooperation is gone. The group no longer depends on a perfect comp — each player slots their own style into the encounter.

⟡ Emplaced Weapons

Armament spread across the field
+ Tactical advantage
Instead of relying only on individual strength, the group uses the emplaced weapons around the terrain to incapacitate the Atirat mount — and gains a decisive advantage for the rest of the fight.

Frenzied Ramux

Phase after incapacitating the mount
⚙ Frenzy phase
When Atirat is incapacitated, Ramux goes into a frenzy. A new set of patterns — the reward for downing the mount comes with a more dangerous boss.

Target priority decides the encounter

⟡ Tactical reading
Two bodies, one fight. Incapacitating Atirat unlocks progress, but wakes the Frenzied Ramux. Use the terrain and the field's emplaced weapons to down the mount, and take advantage of the buffs the fight grants. Decide beforehand who focuses the mount and who holds the knight — going in without target priority is a recipe for a wipe.
CHAPTER 04

Vegamor — the colossus that walks

PvE

The Colossus Vegamor debuts a brand-new boss category in T&L — what the Korean server calls a Terra Boss, something the game has never had. It stands about 200 meters tall, 100 times a 2-meter character: so big that simply moving knocks down everything around it, like a geographic accident that walks.

In the team's words, Vegamor isn't a simple monster — it's a battlefield that moves. You observe, wait for it to stop, and destroy the body parts one by one — and the party climbs onto the colossus's body to wrench out the secrets Nix hides inside it.

⟡ Progress reward

  • Prizes for completing each phase's objectives
  • Victory loot for defeating the colossus in full
  • Each destroyed part is visible progress for the group

⟡ The giant's risk

  • The team describes it as a living natural disaster that moves
  • The damage window only opens when it stops — patience or wipe
  • A scale encounter: large-group positioning matters more than raw damage

Vegamor — scale

About 200 meters · Terra Boss category
⚙ 100× a character
Before
Character ~2 m
After
Colossus ~200 m

Attack window

Strike when it stops
+ Part destruction
On the move, it's terrain. When it stops, the window opens — the group destroys body parts in stages, climbing the colossus itself.

⟡ Emplaced Weapons + form variations

Field siege tools
+ Efficient takedown
The same emplaced weapons spread across the terrain, combined with form-variation strategies depending on the situation, make the takedown far more efficient than raw damage.
Vegamor over the plains of Nix — a tiny character faces the 200-meter colossus
Vegamor over the plains of Nix — a tiny character faces the 200-meter colossus
CHAPTER 05

The teams' word

System

Among all the bosses — including the package's 2 field bosses, like the White-Shoulder Thuban —, the Lead Content Designer's favorite is Ramux, the first T&L boss to arrive mounted on a dragon. Her lore and the dragon Atirat's gets entries in the Extra Codex and the Collection Codex. At the Frontier Stronghold, keep an eye on the NPCs of various races — Lyru is the studio's darling.

The World Content Design Team closes the behind-the-scenes with the tone of a collective work: art, tech, design and even the sound team became a single team to leave a lasting mark on the domain of Nix.

The tundra of Nix seen from above — the domain where the teams left their mark
The tundra of Nix seen from above — the domain where the teams left their mark
Opinion

Scaryel's take

Analysis
S

Scaryel comments

⟡ Creator's voice
“Everyone is going to look at the Colossus Vegamor — a 200-meter giant walking is a guaranteed screenshot. But what really changes the game is in Ramux: swapping absolute cooperation for individual style becomes part of the fight is the most important thing this behind-the-scenes said. Arch Boss always punished those without a sharp group and a rehearsed comp; now the design makes room for PUGs and for players who slot in their own rhythm. If they actually deliver on this, it's the most accessible Arch Boss T&L has ever made. And the technical detail nobody talks about: the Frenzied Ramux only wakes up after you down Atirat — meaning the reward for killing the mount is a meaner boss. Target priority becomes the decision of the encounter.”
Final verdict⟡ Strong behind-the-scenes · Ramux carries the packageConfidence: 7.5/10
Impact

Impact on players

Community

What changes in practice

Nix goes live on June 25 globally (BR included). This behind-the-scenes is the official preview of the bosses, sibling to the world behind-the-scenes published the same week.

For guilds
Train target priority on Ramux right now: who downs Atirat, who holds the knight and who survives the Frenzied phase. Vegamor demands large-group positioning more than raw damage.
For solo PvP
The Colossus and the Arch Boss are open-field content — expect spawn disputes and contested queues on the plains of Nix on day 1.
For casual players
Fellinex and Vulcanus are co-op dungeons with clean telegraphs. The NPC Lyru and the lore Codices give plenty to collect for those who play the story.
Summary

1-minute summary

System

⟡ For those in a hurry

01:00
  1. Fellinex: mechanical cat in the Stone Grave Cradle, inspired by a cat tree, with readable feline patterns.
  2. Vulcanus: abomination of beast + Ironclad Beetle at the end of the Frostbreath Cave, in deep blue tones.
  3. Arch Boss Ramux: fights in sync with the Atirat mount; individual style enters the fight in place of absolute cooperation.
  4. Emplaced Weapons: the Emplaced Weapons around the field are the key to incapacitating Atirat and the colossus — worth more than individual damage.
  5. Frenzied Ramux: a frenzy phase that awakens when you incapacitate the mount — a reward that comes with greater risk.
  6. Colossus Vegamor: brand-new Terra Boss category, ~200 m; you climb its body and destroy it part by part when it stops.
  7. Lore: Ramux and Atirat get entries in the Extra Codex and Collection Codex; NPC Lyru at the Frontier Stronghold. The package also brings 2 field bosses.
  8. Scaryel's verdict: Ramux carries the package thanks to the shift in philosophy. Confidence 7.5/10.
Back to the CodexNext article