Items here are most likely modified for balance reasons. This page will detail every available/relevant weapon and armor item present in Cataclysm. For information about items that enable boss progression, check the unofficial wiki.
Items
Sand Storm in a Bottle
Sand Storm in a Bottle is a spell that can be casted from your Belt slot in Curios API. Upon clicking the action key, transform into a tornado that can spin through the air. There is a cooldown after using it. This item is dropped by the Ancient Remnant.
Bloom Stone Pauldrons
Bloom Stone Pauldrons is a chestplate crafted from Amethyst Crab Shells, which are dropped by the Amethyst Crab. Sneaking while the chestplate is equipped casts a skill which fires amethyst clusters all around you.
Armor: 8 
Toughness: 2 
+1 Knockback Resistance
Infernal Forge
The Infernal Forge is a weapon dropped by the Netherite Monstrosity. Right clicking on the ground casts a skill that deals AOE damage and knocks up enemies. It can be upgraded with a Void Core to become the Void Forge.
Attack Damage: 14 
Attack Speed: 0.7
Attack Range: 2.75
Bone Reptile Helmet and Chestplate
The Bone Reptile Helmet and Bone Reptile Chestplate are crafted with Ancient Metal Ingots, which are dropped by the Kobolediator. They are slightly stronger than Netherite armor.
Helmet
Armor: 6
Toughness: 2.5 
+1 Knockback Resistance
Chestplate
Armor: 11 
Toughness: 2.5
+1 Knockback Resistance
Void Core
The Void Core is an item dropped by the Ender Golem. Right clicking on the ground casts a skill that summons Void Runes in a straight line.
Void Forge
The Void Forge is a weapon that utilizes the Void Core to upgrade the Infernal Forge. Right clicking on the ground casts a skill that summons Void Runes in a fan shape.
Attack Damage: 14
Attack Speed: 0.7
Attack Range: 2.75
Ignis Set
The Ignis Set is a set of armor that is upgraded from Netherite armor using Ignitium Ingots, which are dropped by Ignis. The Ignis Chestplate can be further upgraded to attach an Elytra.
Helmet
Armor: 5
Toughness: 4
+1.5 Knockback Resistance
Chestplate
Armor: 10
Toughness: 4
+1.5 Knockback Resistance
Leggings
Armor: 8
Toughness: 4
+1.5 Knockback Resistance
Boots
Armor: 5
Toughness: 4
+1.5 Knockback Resistance
The Incinerator
The Incinerator is a type of Greatsword that deals massive damage. It can be crafted with Ignitium Ingots, which are dropped by Ignis. It can be channeled to release a wave of fire, which triggers an aftershock of explosions.
Note: The Incinerator's animation is shorter than its actual channel time. When you hear the sound of fire, that means that the ability is ready to be cast.
Attack Damage: 14
Attack Speed: 1.2
Attack Range: 3.0
Bulwark of the Flame
The Bulwark of the Flame is a shield that can be crafted using Ignitium Ingots, which are dropped by Ignis. When holding this Shield, you can charge forward, damaging any entities in-front of you. If they hit a wall, they’ll take additional damage.
Monstrous Helmet
An upgrade from the Netherite helmet! When below half health, knock back nearby entities and increase defense, knockback resistance, and regeneration.
Armor: 5 ![[full_armor_point.png
Toughness: 3
+1 Knockback Resistance
Deleted Items
Coral Bardiche
Gauntlet of Bulwark
Gauntlet of Guard
Khopesh
Laser Gatling
Meat Shredder
Void Assault Shoulder Weapon
Wither Assault Shoulder Weapon