Runescape Game Play

Dark Beasts are easy to kill by the time you have 90 slayer, they are located in the dungeon below the mourners house in West Ardougne, you need to at least start Mournings End Part II and wear the full mourner clothing set, you can not wear anything else to enter the mourners house with the exception of a ring.

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