NETHERITE MONSTROSITY

Health: 600
Defense: 10

An abandoned war machine, slumbering in the Soul Forge located in the Nether. It will awaken upon your approach and use charges, lava bombs, and ground attacks to try and destroy you. Defeating this machine will reward you with the Infernal Forge, a pickaxe-hammer with an area-of-effect attack.

SPIDER MOTH

Health: 300
Defense: 10

General of Darkness of the Arthropod Army. A monstrous adversary lurking in the Overworld, ready to disembowel you at any moment. Hallucinations foreshadowing its appearance may also manifest near you, vanishing at the slightest blow… except when it's not a hallucination. It will do anything in its power to get to you, charging at full speed towards you and using ghosts to teleport to you when they reach you. Killing this monstrosity will reward you with the Abyssal Crystal, a valuable item used to craft many powerful items such as the Abyssal Blade.

IGNIS

Health: 450
Defense: 10

A formidable opponent residing in the Burning Arena of the Nether. To fight this warrior, you will first need to kill an Ignited Revenant and collect its Burning Ashes, then place the Ashes on the Altar at the center of the arena. Ignis has many attacks such as leaps and fireballs, but primarily rely on his sword to attack, with his shield defending his right side. Ignis also regenerates himself with almost each successful hit, and also applies an effect that reduces your armor by 20% per effect level, capped at level 5. Defeating this foe will reward you with Ignitium Ingots, allowing you to craft the Ignitium Armor, which possess many fire-related abilities.

DRACONIC VOIDLASHER

Health: 500
Defense: 10

An overwhelming entity lurking in the End, being the General of Void of the Arthropod Army. While it will leave you alone on the central island, once you venture into the Outer End, it will not let you go. This monster uses telekinetic-based attacks, such as homing missiles and "Void Spears". Killing this monster will reward you with the Void Geode, allowing you to craft numerous powerful weapons such as the very useful Vengeful Voiseeker.

THE TORMENTOR

Health: 1024 (cannot take more than 10 damage per hit, except with the Tormented Wrath)
Defense: 100

The final boss. A gigantic, spider-like eldritch abomination, leader of the Arthropod Army. It only attacks when attacked first and must be fought from a distance. However, a simple bow won't cut it: this boss is immune to weak or medium attacks and requires extremely powerful blows to inflict even the slightest damage. Once provoked, the TORMENTOR will unleash a massive arsenal of attacks to eradicate any threat, such as explosive orbs, miniature stars, a melting ray, and even occasionally summoning enhanced versions of its army's generals. If you somehow manage to defeat this living nightmare, then you will obtain the Core of Eternal Suffering, an ultimate crafting item for making the craziest equipment... and take the place of the TORMENTOR as the god of the cubic world.