Avariterra

The Collector

a neutral mob found in the Burnt Land. 

Its main purpose is trading players can right-click a Collector to open a trading interface and exchange items. Although it is passive by default, the Collector can often be seen sitting on the ground.

Soul Thralls

A summoned undead minion that serves the player. It does not spawn naturally in the world; instead, it is created through a specific interaction using the Carnifex Axe.

To summon a Soul Thrall, the player must first right-click a target mob with the Carnifex Axe. If the  mob is then killed and a Soul Thrall immediately spawns from its location to fight alongside the player.

Spirit Vessels

A spectral entity that manifests as a byproduct of death caused by ... 

Instead, a Spirit Vessel emerges from the location of a living entity immediately after it is killed by either  Carnifex or  Absolon. 

Absolon

A hostile mob found in the Burnt Lands. It appears as a humanoid figure 

It carries a large weapon known as the Absolon Cross. In combat, Absolon is a melee attacker that deals heavy damage. 

Carnifex

A formidable hostile mob found in the Burnt Lands.

It wields a massive two-handed weapon known as the Carnifex Axe. The Carnifex is a heavy melee damage dealer, Like Absolon.

True Form of the Collector ( from Darkest Dungeon )

A hostile boss, it is attracted to players who are carrying a large amount of items, serving as a punishment for hoarding.

In combat, it acts as a Summoner, calling upon minions to swarm the player instead of fighting alone, allowing it to heal itself whenever it damages the player. 

Lantern Keeper

A neutral humanoid entity found roaming the Burnt Land. It will attack other monsters (like Zombies) to protect itself but remains passive towards the player unless provoked.

Despite its strength, it lives in fear of the greater evils; it will actively run away if it spots The Collector, Absolon, or other entities.

Souls Keeper

Scholar

Carnifex Axe

A weapon obtained from the Carnifex. It offers immense power and the ability to command the Soul Thralls, but operates on mechanic that drains the wielder's vitality.

Absolon Cross

A weapon obtained from  Absolon. special mobility mechanic. By holding Right-Click to charge the weapon, the wielder channels dark energy. Upon releasing the charge , the user performs a Dark Leap.

Ravager's Votive

Anchor Stone

Raven's Drift Compass

Bile of Shub Niggurath

Curse of Cosmic Blight

Folio of Alhazred

Cultist's Blood Idol

Madness of Azathoth