It is by far easiest to wear proselyte and use protect melee prayer a God Sword is the weapon of choice to kill Dark Beasts but a whip will work fairly well, you can use Guthans but you will take a lot of damage and be using the spear a lot and therefore slow training down considerably, I always wear a ring of wealth fighting Dark Beasts because they drop dark bows.

Dark beasts look like a cross between a gorilla and a rhinoceros, they are slow clumsy animals that attack using Mage and melee attack styles.

Fighting techniques
Use melee protect prayer and pot up before entering the area, as soon as you enter all beasts will attempt to attack you, if you attack 1 first it will mage you and normally cause damage (about 8) then continue to melee attack, if you just run in they will automatically attack melee and this can save you the mage damage, they will all stare at you as you slaughter their friends but it is non multi area so they can not help, as soon as you have killed 1 another will start to attack, again if you let them attack it will save you the mage damage, you may need to move to give them space to attack you as I said they are slow and clumsy so need a bit of space.
They never get used to you so will always be aggressive, you can just keep topping up your prayer and watch the fight, they rarely have good drops but drop more blue charms than any other colour, I had 19 blue charm's from 170 kills so not a great dropper but proportionally good compared to other charms.

Summary of: Dark Beast
Temperament: Constantly Aggressive
Combat Level: 182
Attack Style: Melee
Use Guthans: Possible but not recommended
Recommended armour: Proselyte or initiate
Slayer Level to kill: 90
Slayer XP: 225
Max Hit: N/K
Examine info: From a darker dimension

Drops: Adamant javelin, Adamant square shield, Adamantite bar, Air rune, Attack potion, Black 2h sword, Black axe, Black battleaxe, Blood rune, Blue charm, Chaos rune, Coins, Crimson charm, Dark bow, Death rune, Death talisman, Dragon medium helm, Dragonstone, Gold charm, Green charm, Grimy cadantine, Grimy dwarf weed, Grimy guam, Grimy harralander, Grimy irit, Grimy kwuarm, Grimy marrentill, Grimy ranarr, Grimy tarromin, Law rune, Loop half of a key, Nature rune, Nature talisman, Rune 2h sword, Rune Arrows, Rune chainbody, Rune full helm, Rune sq shield, Runite bar, Shark, Shield left half, Silver ore, Steel Arrow, Tooth half of a key, Uncut diamond, Uncut emerald, Uncut ruby, Uncut sapphire

I would like to make an exhaustive database of monster information, this is something all the fan sites lack in 1 area or another, I want to bridge this gap but I need your help.

If you have any information about monsters I would love to hear from you, I want to know everything from details how to get there, what their max hit is, special weakness, drops, requirements to kill and killing techniques.

I will start posts with just the monster name and you can add comments, I will review and add the comment, I will then add them to the initial post when I have sufficient time and information.

If there is a monster that I have not yet added a heading for, put the monster name and details as an attachment to this post and I will add a heading for that monster.

Remember I want all information no matter how small so we have the one stop shop for all monster details.

There are 2 places the Abyssal Demons live, the first is the slayer tower in Canafis.

Enter Canafis area via the temple on the Salve (East of Varrock), this is the temple you killed the big dog for the Priest in Peril quest, if you haven't killed the dog you cant get to Canafis or the Slayer Tower.

Assuming you have done the quest when you leave the lower level of the temple take the path north, this will take you to the slayer tower, the first monster you will come across are the crawling hands (there are only 2 aggressive monsters in the slayer tower and I will make you aware of these as you go along).

There is an agility shortcut in the second room if you have the required level you can climb up there, (Beware that brings you out with the aberrant specters these are aggressive and dangerous), if you haven't got the required agility level continue to walk around the rooms past the Banshee's and up the stairs.

The next floor you walk around and when you enter the room with the Infernal Mages there is another shortcut, if you can use this one do so as the other options of using the stairs are dangerous.

If you don't have the agility level walk around the rooms and past the Bloodvelds, in the big Bloodveld room there is a door, this door is to the Aberrant Specters, Be carefully these are very dangerous, if you can not wear a nosepeg you stand a very good chance of dying, a tip is to use a busy world so all the specters are being attacked if they hit you they use mage so they can get you from a distance and can attack you for a long way.

Just inside the door is the shortcut from the crawling hands, if you use the shortcut it is the same as using the door you need to run west then south and enter the stairs as quickly as possible, taking a hit from the specters without a nose peg will effect your stats severely, if you use the agility shortcut to get up and you take a hit you will need to take the stairs back down.

The spectres are the worst once you have got past them and up to the last floor the worst is over, the next room has Gargoyles in these are aggressive and will hit you melee style so wear protect from meele if you have it or just run like hell to the door at the north side enter the door and you are now safe.

The other side of the door is the Nechryael and the top of the agility shortcut from the infernal mages, just walk around the rooms and you will be with the Abyssal Demons.

Watch the players fighting and tell them how great they are if you wish but don't ask for free whips, it has taken a lot of work for them to get that level and noobs asking for a free whip is a pain after a while.

This is however a good way for the lower levels to get some extra cash, a lot of things you may value are left by the higher level players feel free to pick them up and sell if you wish.

After about an hour I got a Mask, Black Mask (10) and I used it, after a slayer task I noticed it was down to Black Mask (3), I was a bit concerned that all this work to get the mask and it would be useless in a few slayer assignments.

I carried on and noticed it had just become a Black Mask, I did a search on the internet and could not find any information about it anywhere, I thought its carp and got my mate to sell it, he got 400k which I thought was good for an inert mask (The description on the examine option).

Having done another search I found the Runescape Knowledge base and it has a mention of the Mask Properties.

Apparently the 1 to 10 is a secondary spell to the main use of the mask, the mask itself in any state gives a 15 bonus to attack and strength if wearing it for your slayer assignment, the 1 to 10 options reduce your opponents defence by 3 to 10 when fighting for slayer or non slayer monsters.

So the secondary part is pretty pointless reduce the defence level on 10 monsters randomly selected, its not going to make any great deal of difference.

After my new found knowledge I went back to get another, the cave horror place is a place that is heaven for rangers, there are so many places to range there and many monsters spread about and the best defence is mage defence so dragon hide is ideal.

I am training strength so I took Guthans to prolong my stay with dragon scimmy and zammy book, taking Guthans was a mistake as I said earlier they are mage based attack and the mage resistance on Guthans is minimal I was constantly taking damage and healing, very little time to use the scimmy.

I spend the whole day there about 3 hours on and off trying to get the mask and gave up, I went off to do the clue I had got, got full rune out of that (Minus shield) so not too bad a break.

Yesterday I did the new Quest, I enjoyed the quest but got a carpy anchor as a reward, its worth the 50k to get it repaired just to have the walk when carrying it but I was hitting 18 fighting with it.

Anyway after the quest I went back to Cave Horrors and after 3 or 4 hours I got the Mask, I was out of there like a shot and off to my slayer task Suqah.

I normally range Suqah because its so easy but I am training strength so meleed them, god I love that mask, my normal max with my dragon scimmy is about 27 with 96 strength, with the mask I was regularly hitting 31's and the occasional 32, to me that is more than 15% but who cares its well 'ard.

I am so glad I eventually found out what the mask does, I don't like buying things that I can get myself so I was well pleased that I got one yesterday, the time was not wasted I bumped up my strength as well so its a win win situation.

Dust Devils live in a well called the smoke well in the Al Kharidian desert just south west of Pollnivneach look for the red ! on the minimap, to enter the well you must wear a face mask or your stats will be hit considerably, there are warnings before you enter if you are not wearing a mask.

Best way to get there is to get to shanty and take a carpet to Pollnivneach. when you get to Pollnivneach head south through the village and keep to the west as you leave the village you will see the ! mark on your minimap on the other side of an elevated section.

You can not enter the well unless you have started Desert Treasure quest this is where the smoke diamond is located.

A tip when fighting Dust Devils is to play in low detail in high detail there is a dust haze across the display making it difficult to see, if you have private text separated it is almost impossible to read, our pictures were taken in low detail so you can see what is happening.

Attacking the Dust Devil in the smoke well is not difficult if you have 65 slayer and you can win a dragon chain body.

To kill the Dust Devil you need to be at least level 65 slayer, they are not difficult to kill and they drop Ugthanki kebabs that heal 19 when eaten so this can make your stay longer, there max hit is 8.

There is a range / Mage spot in the main room and a few scattered around the well, they are non aggressive. but like to spit at you when attacked, they breath in air and dust and bits of gravel and breathe out in your face, without a face mask you will take damage.

You can range the Dust Devils here but it takes a bit of practice to get them positioned correctly

In the picture my friend is not really a midget, I look bigger because I am a Hunk and a lot stronger faster and better than him.

Dust Devils drop Dragon Chain Body

Summary of: Dust Devil
Temperament: Non Aggressive
Combat Level: 93
Attack Style: Melee
Use Guthans: Not possible
Recommended armour: Good Meele armour and can be ranged or maged
Slayer Level to kill: 65
Slayer XP: 105
Max Hit: 8
Examine info: The vacuumed face of evil
Main Drops:
Dragon chainbody, Chaos rune, Coins (15 to 300), Dragon spear, Earth battlestaff, Half of a key, Herb (All) Fire rune, Gems up to diamond, shield Left half, Mithril bar, Nature talisman, Red dragon vambraces, Rune arrow x12, Rune dagger, Rune javelin x 5, Rune spear Ugthanki kebab (1 to 2) Soul rune (2 to 5), Steel axe.

After you get past the Aberrants you need to pass the Gargoyles, these attack melee but you can run past safely, the rest of the monsters in the slayer tower are non aggressive.

You need to have level 80 slayer to kill them, They attack melee, they are not difficult to kill but they produce a small monster called Death Spawn when you attack them, these death spawn fight mage so they can damage you when fighting with a max of about 5, you do not need to kill these for slayer xp and you can go off and fight another Nechryael,

Nechryael drop rune boots quite often, they are quite fun to kill and are very very ugly.

I have often been there fighting Nechryael with 3 death spawn attacking me, its a single combat area but these death spawn don't seem to understand that.

Nechryael and Death spawn attacking me in a single combat zone, Jagex this is bug abuse, ban them.

Nechryael require 80 slayer to kill.

If you wish to range or mage these there is a spot behind the table in the north west corner of the room.

You can Range or Mage Nechryael from behind the table.

Nechryael drop rune boots.

Summary of: Nechryael
Combat Level: 115
Attack Style: Melee, Death Spawn level 46 fight Mage.
Use Guthans: Reccomended
Recommended armour: Good Meele armour and can be ranged or maged
Slayer Level to kill: 80
Slayer XP: 105
Max Hit: 11 ?
Examine info: An evil death demon.
Main Drops:
Adamant platelegs, Rune full helm, Rune kiteshield, Rune boots,, Rune platelegs, Runite bar, Gold bar, Shield left half, Mithril kiteshield, Death rune, Dragon med helm, Avantoe seed, Belladonna seed, Cactus seed, Cadantine Seed, Chaos rune x 37, level 3 Clue scroll, Coins up to 3k, Dwarf weed seed, Half of a key, Irit seed, Kwuarm seed, Lantadyme seed, Law rune x45, Nature talisman, Poison ivy seed, Rune 2h sword, Rune arrows x 42, Snapdragon seed, Steel 2h sword, Steel axe, Steel battleaxe, Thread x 10, Toadflax seed, Tuna, Uncut gem.