Player Modifiers

This page was last updated for (v0.19).

Player Modifiers are various bonuses and penalties that are received from a number of different sources such as Mastery, Equipment, Pets, and Agility obstacles.

Mechanics

Modifiers of the same kind stack additively. For example, if a player who has unlocked Ty (+3% Global Mastery XP) and is wearing an Ancient Ring of Mastery (+7% Global Mastery XP) will receive a total of +10% Global Mastery XP.

Any penalties are subtracted from bonuses of the same type to get the total modifier. For example, if the above player also constructs a Water Trap Obstacle (-6% Global Mastery XP), their Global Mastery XP modifier will instead be +4%.

For modifiers that have a skill-specific variant, the skill-specific bonuses and penalties are also added to the global result when working with that specific skill. For example, a player with Ty and an Ancient Ring of Mastery who also has reached the [Agility#Mastery Pool Checkpoints|10% Mastery Pool Checkpoint]] for Agility (+5% Agility Mastery XP) will receive a total of +15% Agility Mastery XP.

Additive VS Multiplicative

When describing how different bonuses stack, the terms 'additive' and 'multiplicative' are often used to explain how to combine them.

When two bonuses stack additively, the combined bonus is the sum of the first bonus and and the second bonus. For example, if a +10% bonus and a +20% bonus stack additively, the combined bonus will be +30%.

When two bonuses stack multiplicatively, the combined bonuses is instead

[math]\displaystyle{ \small{\begin{aligned} \text{Combined Bonus} = (1 + \text{Bonus 1}) * (1 + \text{Bonus2}) \end{aligned}} - 1 }[/math]

If the same +10% bonus and +20% bonus stack multiplicatively instead, the combined bonus will be +32%. If both bonuses are positive (or if both are negative) and they stack multiplicatively, the combined effect will be larger than if they stacked additively.

List of Modifiers

The following list does not contain all possible bonuses, and although all of the below bonuses are defined in-game there may be some that are not currently in use.

Modifier	Example Text	Notes
Global Accuracy	+5% Accuracy Rating -5% Global Accuracy	Applies to the player's Accuracy Rating for all combat styles
Melee Accuracy Bonus	+5% Melee Accuracy Rating -5% Melee Accuracy Rating	Applies to the player's Melee Accuracy Rating
Ranged Accuracy Bonus	+5% Ranged Accuracy Rating -5% Ranged Accuracy Rating	Applies to the player's Ranged Accuracy Rating
Magic Accuracy Bonus	+5% Magic Accuracy Rating -5% Magic Accuracy Rating	Applies to the player's Magic Accuracy Rating
Melee Evasion	+5% Melee Evasion -5% Melee Evasion	Applies to the player's Melee Evasion Rating
Ranged Evasion	+5% Ranged Evasion -5% Ranged Evasion	Applies to the player's Ranged Evasion Rating
Magic Evasion	+5% Magic Evasion -5% Magic Evasion	Applies to the player's Magic Evasion Rating
Damage Reduction	+5% Damage Reduction -5% Damage Reduction	This bonus is an additive bonus (or penalty) to the player's Damage Reduction.
Melee Strength Bonus	+5% Melee Strength Bonus from Equipment -5% Melee Strength Bonus from Equipment	Despite having the same name, this is different from the Melee Strength Bonus on equipment. Instead, this modifier directly applies to the player's Melee Max Hit.
Ranged Strength Bonus	+5% Ranged Strength Bonus from Equipment -5% Ranged Strength Bonus from Equipment	Despite having the same name, this is different from the Ranged Strength Bonus on equipment. Instead, this modifier directly applies to the player's Ranged Max Hit.
Magic Damage Bonus	+5% Magic Damage Bonus from Equipment -5% Magic Damage Bonus from Equipment	Despite having the same name, this is different from the Magic Damage Bonus on equipment. This modifier is applied multiplicatively with the Magic Damage Bonus on equipment as part of determining the player's Magic Max Hit
Max Hit Percent	+5% Maximum Hit -5% Maximum Hit	This bonus applies to the player's Max Hit. This bonus is applied before Max Hit Flat and stacks multiplicatively with Melee Strength Bonus, Ranged Strength Bonus, and Magic Damage Bonus. Post-Roll Modifiers will still apply after damage is actually dealt, potentially amplifying the effect.
Max Hit Flat	+50 Maximum Hit -50 Maximum Hit	This bonus directly increases or decreases the player's max hit by the listed amount and is applied after all other modifiers to max hit. Post-Roll Modifiers will still apply after damage is actually dealt, potentially amplifying the effect.
Damage to All Monsters	+5% Damage To All Monsters -5% Damage To All Monsters	This bonus is a Post-Roll Modifier that increases the player's damage when attacking any monster. It stacks additively with any other applicable "Damage To..." modifiers.
Damage to Combat Area Monsters	+5% Damage To Combat Area Monsters -5% Damage To Combat Area Monsters	This bonus is a Post-Roll Modifier that increases the player's damage when attacking monsters found in Combat Areas. It stacks additively with any other applicable "Damage To..." modifiers.
Damage to Slayer Monsters	+5% Damage To Slayer Area Monsters -5% Damage To Slayer Area Monsters	This bonus is a Post-Roll Modifier that increases the player's damage when attacking monsters found in Slayer Areas. It stacks additively with any other applicable "Damage To..." modifiers.
Damage to Dungeon Monsters	+5% Damage To Dungeon Monsters -5% Damage To Dungeon Monsters	This bonus is a Post-Roll Modifier that increases the player's damage when attacking monsters found in Dungeons. It stacks additively with any other applicable "Damage To..." modifiers. If fighting a monster also found in non-Dungeon areas, this bonus will not apply.
Damage to Slayer Tasks	+5% Damage To Slayer Tasks -5% Damage To Slayer Tasks	This bonus is a Post-Roll Modifier that increases the player's damage when attacking their current Slayer Task. It stacks additively with any other applicable "Damage To..." modifiers. This bonus will apply if fighting the player's current slayer target in a dungeon, although it won't count towards completing the Slayer Task.