Weakness system

The Weakness system introduces weaknesses to certain monsters. When hitting an npc with its weak damage type your accuracy is increased by 50%. This additional bonus doesn't affect experience gains but let's you kill opponents quicker.

Different kind of element attack style can be obtained through the use of crystals on various weapons such as Abyssal whips, Abyssal staff, bows and their dyed variants as well as the Elemental bow and the Elemental staff. Various other weapons have different damage type. It is good to keep in mind that using earth surge spell with an elemental staff (fire) will cancel out the spell damage type and use the staff source of element instead. For exemple, any spell can be used against dust devil to profit from the accuracy bonus as long as the staff used is imbued with a thunder crystal.

All Undead monsters are immune to rot and poison damage.

Type of crystal	Type of damage
Fire crystal	Fire
Ice crystal	Water
Nature crystal	Earth
Thunder crystal	Air
Rod of Ivandis	Air
Zuriel's staff	Air

Ancient spellbook equivalent

Ancient spellbook may also be used to profit from accuracy bonuses given from element weaknesses.

element	weakness equivalent
Smoke	Air
Shadow	Earth
Blood	Fire
Ice	water

Monsters

Currently, only the following monsters are considered in the Weakness system

Monster	Weakness	accurcy increase
All monsters inside Vampire catacombs except for Ranis, Vanescula and Vanstrom klause	Air**, Silver *	50%
Aberrant spectre	air	50%
Abyssal champion	Water	50%
Abyssal demon	water	50%
Abyssal watcher	stab	50%
Ankou	Air	50%
Aquanite	Earth	50%
Aviansie	Air	50%
Baby blue dragon	Water and stab	50%
Balfrug kreeyath	Water	50%
Banshee	Air	50%
Banshee noble	Air	50%
Barrows Brothers	Air & thrown	50%
Bronze dragon	Earth and crush	50%
Brutal green dragon	Water and stab	50%
Chaos elemental	Earth	50%
Chronozon	Water	50%
Cockatrice	Stab	50%
Commander Zilyana	arrows	50%
Corporeal beast 1st form	Stab	50%
Corporeal beast 2nd form	Air	50%
crypt spider	fire	50%
Dagannoth prime	Arrow	50%
Dagannoth rex	Fire	50%
Dagannoth supreme	Stab	50%
Dark beast	Slash	50%
Darkatrice	Stab	50%
Dreadnaut	crush	50%
Dust devil	Air	50%
Electryael	Stab	50%
Enduring glacyte	Fire	50%
Fire giant	Water	50%
Flame lion	Water	500%
Frost dragon	Fire & stab	50%
Frozen wyvern	Fire	50%
Gargoyle	Crush	50%
General Graardor	arrows	50%
Ghost	air	50%
Giant crypt spider	Fire	50%
Giant mole	Slash	50%
Glacor	fire & crush	50%
Gravecreeper	Crush	50%
Green dragon	Water and stab	50%
Gulega	Stab	50%
Haasghenahk	Crush	50%
Haasghenihk	Crush	50%
Har'Lakk	Slash	50%
Hill giant	Fire	50%
Hobgoblin geomancer	Crush	50%
Ice demon	Fire	50%
Ice giant	Fire	50%
Ice spider	Fire	50%
Ice strykewyrm	Fire	50%
Jelly	Crush	50%
Jungle lion	Slash	500%
Jungle spider	Fire	50%
Jungle snake	Earth	50%
Jungle strykewyrm	Stab	500%
K'ril Tsutsaroth	Water	50%
Kal'Ger	Water	50%
Kalphite guardian	Fire	50%
Kalphite queen 1st form	Stab & crush	50%
Kalphite queen 2nd form	Fire & thrown	50%
Kalphite soldier	Fire	50%
King black dragon	Water & stab	50%
Kolodion spider	Fire	50%
Kree'Arra	air	50%
Lesser demon	Water	50%
Light beast	Slash	50%
Lucien Van Rot	Crush	50%
Magmanite	Water	50%
Mithril dragon	Earth and crush	50%
Moss giant	Fire	50%
Nechryael	Earth & stab	50%
Nex	Bolt	50%
Nuclear devil	Air	50%
Obsidian dragon	Water and stab	50%
Poison spider	Fire	50%
Red dragon	Water and stab	50%
Rot mosquitos	Air	50%
restless archers, warriors and wizards (Green)	Bolt	500%
restless archers, warriors and wizards (Purple)	Earth	500%
restless archers, warriors and wizards (red)	Crush	500%
Rot zombie	Air	50%
Runebound behemoth	Crush	50%
Sapping glacyte	Fire	50%
Skeletal horror	Air	50%
Skeletal wyvern	Fire	50%
Skeleton	air	50%
Skeleton hero	Air	50%
Smoke demon champion	Water	50%
Smoke devil	Air	50%
Spectral attendant	Air	50%
Spectral cultivator	Air	50%
Spectral tender	Air	50%
Spectral worshipper	Air	50%
Steel dragon	Earth & crush	50%
Tormented demon	Water	50%
Turoth	Crush	50%
tzHaar	Water	50%
Undead monsters	Air	50%
Unholy cursebearer	Air	50%
Vanstrom klause, Ranis drakan & Vanescula drakan	Fire** & Silver*	50%
Vampyre	Fire** & Silver*	50%
Wildywyrm	Water	50%
Yk'Lagor	Arrow	50%
Zogre	Air	50%

* Silver damage is dealt by blisterwood weapons, which cause a standard 20% damage and accuracy boost when hitting monsters with silver weakness.

** Vyrewatches and monsters in the Vampire catacombs can only have one weakness damage type and spell type takes priority.