Modifier

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Modifiers are split up in to two main groups, prefixes and suffixes. A magic item can have only one prefix and one suffix, never two prefixes or two suffixes. Rare items can have up to six modifiers, it is unknown if there is a limit on how many of these can be prefixes/suffixes. A randomly generated rare item (from a drop or Orb of Alchemy) receives between four and six modifiers randomly, with the following odds: 1/12 chance of 6 mods 4/12 chance of 5 mods 7/12 chance of 4 mods

All modifiers have a level associated with them, and will only appear on items with an item level greater than or equal to the modifier's level.

Modifier Stacking

In general, integer modifiers are applied before percentages. Percentage modifiers using the words "% increased" or "% reduced" stack additively with one another, while "% more" and "% less" modifiers stack multiplicatively.

When dealing with weapons, some modifiers that are listed on the weapon itself are applied first, before mods from other pieces of equipment, skills, and so on. This includes anything affecting physical damage, such as increased physical damage, added physical damage, quality etc., and also attack speed, critical strike chance, critical strike multiplier, and accuracy. It does not include elemental damage mods.

Similarly, when dealing with armour, evasion, and energy shield on armour, any modifiers affecting those stats that are listed on the piece of armour are applied first. This includes quality and any other mods directly affecting armour, evasion, or energy shield amount. It does not include mods affecting the energy shield recharge delay or regeneration rate, only the amount of energy shield.

Imagine I have 100 life, and two passive skills that increase total life by 15%. The total bonus will be 30%, resulting in 130 life. Now imagine I am wearing boots that give +40 life, and have a passive skill that grants +20 life. The integer bonuses are applied first, giving me 160 life, then the percentage bonuses are applied to that subtotal, for a final total of 208 life.

Quality behaves differently on armour and flasks than on weapons. On armour and flasks, it stacks multiplicatively with other modifiers on that piece of equipment.

Quality on weapons stacks additively with other % modifiers on the weapon.