Chaos Elemental

The Chaos Elemental is one of the strongest monsters in the Wilderness, overtaking the King Black Dragon, which held the title for 4 years prior to the Evolution of Combat. The Chaos Elemental held the title for 2 years and 7 months before the introduction of the Corporeal Beast.

The Chaos Elemental is known for the dragon 2h sword, Ancient Warriors' equipment and ancient artefacts it can drop. In addition, it drops large quantities of Chaos runes, Blood runes and Death runes, more than most other monsters.

On 1 February 2011, the Chaos Elemental received a graphical update. Prior to, it resembled a dark cloud with six tentacles and a lavender tint.

Location
The Chaos Elemental dwells in the members-only section of the Wilderness, just west of the Rogue's Castle. This area is moderately easy to access from the deep Wilderness teleport lever in Ardougne or Edgeville. A Wilderness Obelisk can randomly teleport players southeast of the Rogue's Castle.

Attacks
Discord: The Chaos Elemental's primary attack, a projectile attack, is an orb of different colours fired at the target. This attack can deal either magic, ranged, or melee damage - it is impossible to distinguish what damage is dealt until the attack hits. The projectiles hit into the 500s, but it is still suggested that players utilise Protect from Magic to reduce the chance of being hit, as the projectile deals magic damage most frequently.

It also has two special attacks:
 * Confusion: The Chaos Elemental teleports the players to a random area nearby, unless they are 20 Game squares away.
 * Madness: The Chaos Elemental will remove the player's mainhand weapon and randomly remove up to three equipped items. If the player's inventory is full, items will stay equipped.

Drops
As of 1 February 2011, the drops from the Chaos Elemental have been improved, as it now drops Ancient Warriors' Equipment, Ancient artefacts and Brawling gloves in addition to previous drops.

The Chaos Elemental usually drops two items, however it can drop one item occasionally.

Seeds
Seeds are usually dropped in assortments of 3 seeds, but only a single seed of one kind is also possible.

Letters
The Chaos Elemental's letters in Postbag from the hedge hint at forthcoming updates, in a rather cryptic manner.

Trivia

 * The examine information of the Chaos Elemental, pUre A cHaOs of crEatuRe!, reflects its chaotic nature. A grammatically correct examine would be "A creature of pure chaos." The chaotic nature of the examine text is also symbolised by the alternating between upper and lower case.
 * The Chaos Elemental can still attack players even while doing its death animation. It is unknown if this was intended or not.
 * In Postbag from the Hedge #39, Reldo states that the Chaos Elemental is related to the Balance Elemental by some means.
 * In Postbag from the Hedge #41, Postie Pete went through the Chaos Elemental's suitcase and found it to be full of paper. He had previously asked the elemental's actual name, and although the Chaos Elemental teleported, the words on the scraps of paper either underlined or circle with red spell the phrase 'Is Eondethwleaos' when reversed.
 * After killing the Chaos Elemental, the adventurer's log will say "I killed the cHaOs EleMeNTal.", similarly to the examine text, as it alternates between upper and lower case.
 * Killing more than one Chaos elemental will result in the Adventurer's Log saying "I killed # cHaOs EleMeNTalS."
 * Currently, this monster holds the record for having the largest drop table, with 128 different items, not counting different quantities or the rare drop table.
 * Prior to the Evolution of Combat, the Chaos Elemental had a combat level of 305.
 * The Chaos Elemental is known to have no exact age, the formula for it changing every day. The following formulas are known to have been the ages of the Chaos Elemental in the past:
 * On 9 Bennanth 169 in the 5th age, the Elemental's age was: $$Age_{CE} = (N_{Yew trees} - N_{Coal rocks}) \times N_{Werewolves} \pm 2000)$$
 * Where $$N_{Object}$$ is the number of such object that exist.
 * On 30 Fentuary 169 in the 5th age, the Elemental's age was: $$Age_{CE} = P_{\pi \left( \frac{N_{Pies eaten} + \sqrt{Area_{Wilderness}}}{Depth_{Ardougne port}} \right ) \pm 1/0 }$$
 * Where the number of pies eaten is the count from the day before this letter was received
 * The area of the Wilderness is in acres
 * The depth of Ardougne's port is taken in fathoms
 * Here, $$P_n$$ indicates the nth prime number, and $$\pi(n)$$ is the function that counts the number of prime numbers less than or equal to n.
 * The plus or minus is to be taken to whichever index of $$P_n$$ produces the closest prime number to the argument used in the prime counting function
 * Another way to put this is to find $$\frac{N_{Pies eaten} + \sqrt{Area_{Wilderness}}}{Depth_{Ardougne}}$$, and then use the nearest prime number as the age of the elemental
 * It is not mentioned how to calculate the age of the elemental if this formula falls evenly between two different prime numbers
 * While not mentioned how it was calculated, the Elemental is known to be 12,000 years old when its Top Trumps card was written.
 * The Wilderness Warning Sign that can be found on the perimeter of the wilderness, contains an image of the Chaos Elemental and when examined shows the text "Danger, Wilderness up ahead. Watch out for the Beast!".
 * There is a gravestone in the New Varrock graveyard named "Chaos Elemental's gravestone" which reads "Hark! Aagi Zoids. Incognito, most likely."
 * An unknown update increased the spawn speed of the Chaos Elemental due to player complaints on its very slow respawn speed prior to EoC.
 * The spawn speed was further increased with the Patch Notes of 5 May 2015 since it was the only boss that could not be instanced.