The '''Demon Slayer effect''' is a group of [[buff]]s that are related to fighting various demonic creatures.

Note that while they are grouped on this page, susceptibility to silverlight/darklight, holy water, and other demon slayer effects are three separate groups and may apply to different monsters.

==Effects==
===Silverlight and Darklight===
{{main|Silverlight|Darklight}}
Silverlight and Darklight have several major effects while fighting demons:
* Increased overall damage scaling with the user's Attack and Strength levels, and the target's Defence level (×1.25-2.24)
* Increased [[hit chance]] (+20%)
* Will use the weakness [[affinity]] of the target, rather than melee affinity

Darklight can be upgraded by completing [[Dimension of Disaster]], which increases the hit chance to +30% and the damage multiplier to (×1.5-2.49).

The upgraded Darklight in particular is very potent, especially when combined with a strong off-hand weapon like an [[off-hand drygore mace]] and power armour.

===Holy water===
Holy water provides a large hit chance increase against a number of demonic monsters (the same monsters that are affected by Silverlight). It provides increased damage against a smaller number of demons, primarily variants of [[lesser demon]]s, [[greater demon]]s, and [[black demon]]s.

===Demon Slayer perk===
{{main|Demon Slayer (perk)}}
The Demon Slayer [[perk]] can be applied to any augmented armour or weapon. It simply increases all damage done to demons by 7%.

===Demon Bait perk===
{{main|Demon Bait}}
Converse to Demon Slayer, the Demon Bait [[perk]] can be applied to any augmented armour or weapon, and is generally considered to be a negative perk. It increases all damage done '''to the user''' by demons by 30%.

===Demon slayer sigil===
{{Main|Demon slayer sigil}}
The demon slayer [[sigil]] is an tradeable item that increases all damage done to demons by 15% for 10 seconds when activated, and will put the sigil slot on a 60 second cooldown.

===Demon slayer equipment===
{{main|Demon slayer equipment}}
Demon slayer equipment is a set of ranged equipment that includes tier 60 ranged power armour and tier 57 dual-weild crossbows. It has additional bonuses against demons:
* Each piece increases all damage done by the user by 4% (to +20% for the armour only and +28% including weapons)
* Each piece increases combat experience by 2% (to +10% for the armour and +14% including weapons)
* If on a relevant Slayer task, each piece increases Slayer experience earned by 1%, with an additional 1% set bonus for wearing all 7 pieces (to +5% for the armour and +8% including weapons)

The effects of demon slayer equipment applied to all styles, regardless of weapon used - but as it is ranged armour, one will suffer accuracy penalties when using melee or magic with the set. Sufficiently high level gear can overcome this, though.

==Monsters==
{{main|:Category:Weak to Silverlight|:Category:Susceptible to demon slayer|:Category:Susceptible to holy water}}

{{#dpl:
|namespace=
|category=Weak to Silverlight¦Susceptible to demon slayer¦Susceptible to holy water
|ordermethod=title
}}

===Notable exceptions===
Notably, the demon slayer effect does not apply to:
* [[K'ril Tsutsaroth]]
* [[Ripper Demon]]
* [[Slasher Demon]]
* [[Kal'gerion demon]]
* [[Twin Furies]]