Void Elemental

The Void Elemental is the strongest and hardest monster to kill. You can tell that it has very high defence, attack and high hitting stats due it's low HP for this combat level. It is immune to any sort of physical attack. So melee or ranging it is useless (enchanted bolts can still hit it, but they only do about 15% damage). The best method is to mae it from distance. The Void Elemental is weak to wind attacks, so using Wind surge is recommended.

Location
The only location is deep in the void realm. You get to the void realm from the portal in the centre of the wilderness vulcano. You need to have done the Supermassive Black Hole! quest to fight this monster.

Attack Styles

 * It most times attacks with a 2 black surge spells, both comming from their opposite direction, each doing up to 30 damage. This attack is magic based, and praying against magic reduces the damage completly. It's attacking speed is like the one of a short bow on rapid mode.
 * The Void Elemental's max hit differs between each player. It has a special attack which is 90% of your current HP. If it uses this special attack on a steel titan it can hit a 675 (750*0,9=675). Note that it can never kill you with this special attack, as it is always rounded down. This attack is melee, but can hit your 2 sqaures away (like halberds). Praying against melee has no effect. Also, no defence stats can prevent this monster from hitting you. It is unknown why. Either it's accuracy is so high, or it is a completly different style. Note that this attack affects every player in it's area. You always can tell when it will use this attack again, because you can see it getting a little bit smaller, and darker too. It takes about 2,5 seconds till this spell is fully charged.
 * Another special, but uncommon, attack are junks shooting from it's middle to you. These are items comming from an other dimension. These are able to hit over 100 damage but this is very rare. It most times does about 40-50 damage. After this attack hit you, an item will appear under your feet. This can sometimes be a usefull item, but most times, it is just a rock or a stone. This attack is ranged based and praying against range reduces the max hit of this attack to 15, but it most times only hits 9-12 damage. This attack can be uses anytime to any other attack. So it is possible that it uses the -90% special attack with this one simultanously. This would kill you, even if you have protect from ranged activated. This attack occurs about 4-5 times each fight.

Strategy
As said above, the best way to kill this Elemental is to use Wind Surge. You also should get prayer and magic boosting equipment like god robes. You should get a team of about 15 people. High magic level is suggested. Should you die, enter the portal and start to fight the elemental again as fast as possible. If no one is left, it will recharge it's HP to 100%.

Drops
(always 3 from the non 100% Category)

100%
Void Charm

(from the special attack)
Any item fom the drop table Many more, including 3rd age armour, Visage, dragon items. Any junk, like tools, pots, buckets,...

Weapons and Armour
Shaman Battlestaff (very rare)

Dragon 2 Handed Sword (semi-rare)

Dragon Warhammer (semi-rare)

Dragon Claws (semi-rare)

Dragon Spear (semi-rare)

Dragon Medhelm (common)

Any Rune Weapon (common)

Any Rune Armour (common)

Any Black Weapon (very common)

Any Black Armour (very common)

Runes
10000 Air runes (very common)

500 Elemental runes (semi-rare)

300 Death runes (uncommon)

1000 Chaos runes (uncommon)

200 Soul runes (common)

5000 Body runes (uncommon)

200 Cosmic runes (very common)

100 Law runes (uncommon)

100 Astral runes (uncommon)

Arrows
100 Dragon Arrows (semi-rare)

200 Rune Arrows (common)

300 Adamant Arrows (very common)

500 Mithril Arrows (very common)

700 Steel Arrows (very common)

1000 Iron Arrows (very common)

Charms
none (as it always drops a Void Charm)

Misc.
Coins 5,300-12,100 or 20,000

Magic Stone (semi-rare)

10 Runite Bars (noted) (semi-rare)

70 Adamantite Bars (noted) (semi-rare)

190 Mithril Bars (noted) (semi-rare)

Trivia

 * At it's release, low level players complained, that people do not lose any item and that they can immiadiatly gestart the fight. Jagex said, that noone would fight it, because it's high hits.
 * This mosnter looks like a miniature black hole which explains it's special attack.
 * The Items it throws is sometimes more worth then it's drops.