Slayer Areas are combat areas specific to the 
Slayer skill. Unlike other combat areas, killing monsters within these areas will grant the player Slayer experience equal to 5% of the slain monster's hitpoints. In addition, many of the monsters found within Slayer areas drop unique items that cannot be acquired elsewhere.
Most Slayer areas have entry requirements that must be met before monsters within the area may be successfully attacked. Areas may also have area effects, which will negatively impact the player while in combat.
List of Areas
Entry Requirements
All Slayer areas other than 
Penumbra and 
Forest of Goo have Slayer level requirements that must be met before monsters within the area may be fought. Some of these areas will also require a specific item of equipment to be worn, this equipment can be purchased with 
Slayer Coins from the Shop and must be worn at all times when in combat - if the item is unequipped during combat then all of the player's attacks will miss until the item is re-equipped. Alternatively, the player can equip either the 
Slayer Skillcape, 
Max Skillcape, or 
Cape of Completion, which bypasses the equipment requirement for any Slayer areas that have any such requirement.
Dark Waters has a unique requirement, where the 
Into the Mist dungeon must have been completed at least once before the area can be entered.
Area Effects
Some Slayer Areas have area effects, which will negatively impact the player while in combat with monsters within that area. The strength of these effects can be reduced by wearing equipment which provides Slayer area effect negation, a complete list of such equipment is provided below.
There are two types of effect negation: percentage and flat, where percentage negations are applied before flat negations. The difference between the two types can be illustrated with a simple example: Suppose an area has an effect of -30% accuracy rating, then:
- A percentage negation of 10% would reduce the area effect to 90% of its original strength, so the area effect would instead reduce the player's accuracy ratings by [math]30 \times \left (1 - \tfrac{10}{100} \right ) = 27\%[/math]
- A flat negation of 10% would reduce the area effect by 10 percentage points, which would reduce the player's accuracy ratings by [math]30 - 10 = 20\%[/math]
In other words, the reduced strength of an area effect can be calculated using the following formula:
[math]\text{Reduced Area Effect Strength(%)} = max \left ( \left \lfloor \text{Base Area Effect Strength(%)} \times \left (1 - \frac{\text{Percentage Effect Negation}}{100} \right ) - \text{Flat Effect Negation} \right \rfloor, 0 \right )[/math]
Note that the flat negation is applied after the percentage negation. For example, a player wearing both the Slayer Skillcape (60% area effect negation) and a 
Hunter's Ring (flat 10% area effect negation) entering an area with a -30% accuracy rating effect would experience only a [math]30 * (1 - 0.6) - 10 = 2\%[/math] accuracy reduction.
Items with Area Effect Negation
Mirror Shield Equipped
Desert Hat Equipped
Magical Ring Equipped
Blazing Lantern Equipped
Climbing Boots Equipped
Combat:
Beginners Guide 
Guides 
Bank 
Mastery 
Money Making 
Shop 
Easter Eggs 
Pets 
Golbin Raid
