Items can be Normal (grey), Magic (blue), Rare (yellow) or Unique (brown). Item Classes which do not have these rarities, such as Currency, have individual rarity for each item. Magic items can have 2 Modifiers; a Prefix and a Suffix. Rare items can have up to 6 Modifiers; 3 Prefixes and 3 Suffixes. More powerful and dangerous enemies are more likely to drop rarer Items.

Spells are skills that use raw magic to destroy your enemies. Attacks are not Spells. Spells have their own base damage, cast speed and Critical Hit chance determined by the skill. They do not benefit from a weapon's inherent damage, attack speed or Critical Hit chance.

Attacks are skills that directly damage enemies, usually using your equipped Martial Weapon. Spells are not Attacks. The base damage, attack speed and critical hit chance of an attack are determined using your Martial Weapon's stats unless the skill says otherwise. Attacks do not necessarily deal Physical damage — they can deal any damage type.

Spirit is a reserve of power used to activate and maintain skills with permanent effects. Spirit-powered skills are managed within the Skills Panel. Weapon Sets can have differing amounts of available Spirit, due to weapons with Spirit (such as Sceptres), Weapon Set Passive Skills, or Persistent Skills that are active in specific Weapon Sets.

Effects that Chain are redirected to another target after colliding with an enemy. Projectiles Splitting, Piercing or Forking take priority over Chaining. Projectiles have a base chaining distance of 6 metres whereas other effects have a chaining distance of 4 metres. Enemies cannot be targeted more than once in the same Chain.

Some Skills create Elemental Infusion Remnants when specific conditions are met. Picking up the Remnant grants you the Infusion for 20 seconds or until it is Consumed by another Skill. You can have up to 3 of each Infusion by default. Skills that can Consume Infusions specifically mention the type(s) of Infusion they can Consume and the benefits for doing so. If a Skill repeats or reoccurs, each of them must Consume an Infusion separately to gain the effect.