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A wall beast is a Slayer monster that requires level 35 Slayer to kill. A spiny helmet is required to start fighting one. Players without 5 Defence would not be assigned these as 5 Defence is required to wear the helmet. This monster is not very popular, due to the fact that its drops are poor with the exception of the mystic hat. It is found only in the Lumbridge Swamp Caves.
This creature is infamous for surprising, and often killing, low-level players in the Lumbridge caves.
The creature's immunity to poison has been confirmed with the use of the Monster Examine spell.
Strengths and Weaknesses
Players should wear a spiny helmet whilst fighting wall beasts, otherwise they will grab them by the head and slam them against the wall, removing up to 18 Hitpoints.
If players wear a spiny helmet, the grabbing attack will fail, allowing them to be fought normally. A wall beast's maximum hit on a player wearing a spiny helmet is 4.
The spiny helmet is only required to initiate combat with a wall beast. Once it has started attacking normally, it can no longer grab the player's head, allowing a black mask to be used.
The wall beast does not count as a large monster and therefore the dragon halberd's special attack does not produce two hits on it.
Many people tend to skip the slayer task involving Wall beasts, because the respawn rate is long and the beasts are scattered across the dungeon. However, you can quickly make a beast reappear by leaving the dungeon and entering it again, making the beast located west of the entrance available to slay again.
Despite their relatively high level, Wall beasts have a low max hit and can easily be killed by a player with low combat.
Drops
Runes
Item Quantity Rarity GE market price 
Air rune 3 Common 15
Cosmic rune 2 Rare 286
Chaos rune 3; 7 Rare 267–623
Weapons and armour
Item Quantity Rarity GE market price
Bronze med helm 1 Common 76
Bronze full helm 1 Common 58
Iron med helm 1 Common 39
Steel med helm 1 Common 55
Steel full helm 1 Common 146
Black full helm 1 Uncommon 508
Mithril med helm 1 Uncommon 275
Mithril full helm 1 Uncommon 676
Adamant med helm 1 Uncommon 938
Mystic hat (light) 1 Rare (1/512) 8,627
Herbs
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