Damage Reduction

Damage Reduction is a stat that does exactly what it suggests: It reduces the amount of damage taken by a player or monster. Unlike other combat numbers that are complex calculations, a player's Damage Reduction is determined by simply adding together all Damage Reduction bonuses the player has, whether from equipment or something else like a Damage Reduction Potion or Leonardo (pet).svg Leonardo.

Many monsters have Damage Reduction modifiers that affect their defensive stats.

Mechanics

Whenever a player or monster with Damage Reduction greater than 0% would receive damage, instead the damage the damage they take is equal to:

Damage Taken=Base Damage∗(1−Damage Reduction)

Note that the Combat Triangle will affect how much damage reduction the player has if they are using a different style from the monster.

Modifiers

Source	Type		Other Modifiers
Damage Reduction Potion IV	Item	+10% Damage Reduction
Damage Reduction Potion III	Item	+6% Damage Reduction
Guardian Amulet	Item (Amulet, Passive)	+5% Damage Reduction	+10% Attack Interval
Error creating thumbnail: File missing Holy Aegis	Prayer	+5% Damage Reduction
Damage Reduction Potion II	Item	+4% Damage Reduction
Defence Relic 5	Ancient Relic	+3% Damage Reduction
Error creating thumbnail: File missing Stone Skin	Prayer	+3% Damage Reduction
Damage Reduction Potion I	Item	+2% Damage Reduction
Error creating thumbnail: File missing Gods Enhancement (Superior)	Item (Enhancement1, Enhancement2, Enhancement3)	+2% Damage Reduction	+4% Maximum Hitpoints +20% chance to ignore Stun, Freeze or Crystallize
Error creating thumbnail: File missing Gods Enhancement 2 (Augmented)	Item (Enhancement2)	+2% Damage Reduction
Error creating thumbnail: File missing Lake Swim	Agility Obstacle 6	+1% Damage Reduction	+3% Chance To Preserve Prayer Points +5% Damage To All Monsters
Error creating thumbnail: File missing Raft Building	Agility Obstacle 8	+1% Damage Reduction	+20 Maximum Hitpoints +2% Damage To All Monsters
Error creating thumbnail: File missing Frozen Maze	Agility Obstacle 11	+1% Damage Reduction	-20% Ammo Preservation -3 Prayer Point Cost for Prayers -20% Rune Preservation -0.1s Monster Respawn Timer
Error creating thumbnail: File missing Gods Enhancement 2	Item (Enhancement2)	+1% Damage Reduction
Smithing Lesser Relic	Item (Consumable)	+1% Damage Reduction	-5% Smithing Interval +10% Global Evasion
Error creating thumbnail: File missing Yak	Item (Summon1, Summon2)	+1% Damage Reduction
Error creating thumbnail: File missing Erran	Pet	+1% Damage Reduction
Error creating thumbnail: File missing Leonardo	Pet	+1% Damage Reduction
Error creating thumbnail: File missing Safeguard	Prayer	+1% Damage Reduction
Error creating thumbnail: File missing Martyr	Prayer	-1% Damage Reduction	+40% Reflect Damage
Error creating thumbnail: File missing Spike Trap	Agility Obstacle 7	-2% Damage Reduction	-40 Maximum Hitpoints
Error creating thumbnail: File missing Mud Dive	Agility Obstacle 4	-4% Damage Reduction	+20 Maximum Hitpoints +2% Melee Max Hit +5% Melee Accuracy Rating
Masquerade Mask	Item (Consumable)	-4% Damage Reduction	+45 Stealth while Thieving -25% Thieving Stun Interval
Error creating thumbnail: File missing Lava Jump	Agility Obstacle 9	-6% Damage Reduction	-6% Mastery XP in all Skills -6% Auto Eat Efficiency -0.3s Monster Respawn Timer