Item or Monster rarity can be Normal (grey), Magic (blue), Rare (yellow) or Unique (brown). As a general rule, monsters increase in difficulty depending on their Rarity.

Magic and Rare Monsters have Modifiers which will augment them in many dangerous ways, making them more powerful and deadly foes. Magic Monsters will normally have a single Monster Modifier, whereas Rare Monsters have up to 4 by default.

Monster Modifier Chance increases the potential number of Rare Monster Modifiers with each modifier above 4 requiring twice as much Modifier Chance. Monster Modifier Chance above the maximum number of modifiers increases the chance Rare monsters will have maximum modifiers.

Other mechanics such as Azmeri Spirits, Essences and Delirium can add additional Monster Modifiers to monsters of any rarity.