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 obtain through the use of crystals on various weapons such as Abyssal whips, staves, 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 may also be used to profit from accuracy bonuses given from element weaknesses.

element	weakness equivalent
Smoke	Air
Shadow	Earth
Blood	Fire
Ice	water

Currently, only the following monsters are considered in the Weakness system: *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.

Monster	Weakness	accurcy increase
All monsters inside Vampire catacombs except for Ranis, Vanescula and Vanstrom klause	Air**, Silver *	50%
Aquanite	Earth	50%
Aviansie	Air & stab	50%
Banshee	Air	50%
Barrows Brothers	Air & thrown	50%
Bloodveld	Slash	50%
Chaos elemental	Earth & bolt	50%
Cockatrice	Stab	50%
Commander Zilyana	Earth & crush	50%
Corporeal beast 1st form	Stab & slash	50%
Corporeal beast 2nd form	Air & thrown	50%
Dagannoth supreme	Stab	50%
Dagannoth prime	Arrow	50%
Dagannoth rex	Fire	50%
Dark beast	Slash	50%
Demons	Water	50%
Dragons	Water & stab	50%
electryael	Earth & stab	50%
Fire giant	Water & bolt	50%
Frost dragon	Fire & stab	50%
Gargoyle	Crush	50%
General Graardor	Fire & thrown	50%
Giant mole	Fire & Slash	50%
Glacor	fire & crush	50%
Gulega	Stab	50%
Har'Lakk	Slash	50%
Hellhound	Water	50%
Ice giant	Fire	50%
Ice spider	Fire	50%
Ice strykewyrm	Fire & crush	50%
Jelly	Crush	50%
K'ril Tsutsaroth	Water & arrow	50%
Kal'Ger	Water	50%
Kalphite queen 1st form	Stab & crush	50%
Kalphite queen 2nd form	Fire & thrown	50%
King black dragon	Water & stab	50%
Kree'Arra	air & stab	50%
Kolodion	Fire & crush	50%
Light beast	Slash	50%
Lucien Van Rot & followers	Crush	50%
Magmanite	Water	50%
Metal dragons	Earth & crush	50%
Nechryael	Earth & stab	50%
Nex	Bolt	50%
Skeletal wyvern	Fire & crush	50%
Smoke demon champion	Water & arrow	50%
Smoke devil & Dust devil	Air	50%
Spiders	Fire & crush	50%
Tormented demon	Water & stab	50%
Turoth	Crush	50%
tzHaar (excluding HM fight caves	Water & crush	50%
Undead monsters	Air & thrown	50%
Vanstrom klause, Ranis drakan & Vanescula drakan	Fire** & Silver*	50%
Vampyre	Fire** & Silver*	50%
Wildywyrm	Water & slash	50%
Yk'Lagor	Arrow	50%