Nex

Nex is an immensely powerful entity, and one of Zaros' most powerful weapons of war. It is said that what she really is has been long lost to time. However, she possesses physical traits of the icyene, demons, aviantese and vampyres, being graceful, yet cruel and vicious. Thus, her race is indeterminable and her history and origin equally largely a mystery. It is known, though, that she is aligned to Zaros, being one of his most powerful weapons of war, and acts as something of a leader to his last army.

Nex resides behind the Frozen door in the God Wars Dungeon, in a previously inaccessible area which was released on 10 January 2011. She has over 15 unique combat moves, the most for any monster in the game. Her chamber is a multicombat area like the rest of the God Wars dungeon. She is cited as being RuneScape's most powerful and intelligent boss to date.

In order to fight Nex, you must access all of the strongholds (but not boss room) and defeat a follower to retrieve a key part. This includes: Armadyl, Bandos, Saradomin and Zamorak, effectively requiring 70 Agility, Constitution, Strength and Ranged (some boostable) to fight Nex. Together, the parts make a Frozen key with 5 charges to open the Frozen door. The key can be repaired for a cost of 50,000 coins per charge.

Unlike the other bosses of God Wars Dungeon, there is a bank to refill on supplies before fighting Nex. However, there is no altar within the boss chamber.



History
The Zarosian army was imprisoned by Saradomin's forces in the beginning of the Third Age in an attempt to rid Gielinor of Zaros's followers. Nex managed to escape sometime during the God Wars when Saradomin, Armadyl, and Bandos were fighting the Zamorakian Army to protect the Godsword. It took the combined efforts of all 4 armies of the Gods to imprison Nex and her army behind the Frozen door in the Godwars Dungeon. However, because of all the adventurers who came to the God Wars Dungeon looking for the Godsword, Nex has once again awakened and is now trying to escape from her imprisonment. This time it is up to the adventurer to contain Nex once again.

The Four Mages
There are 4 level 285 mages on the each corner of Nex's chamber which each represent smoke, ice, shadow and blood spells. Nex draws power from them to use their spells as somewhat like an arena effect. You will be able to kill one of the mages when you take down a quarter of Nex's LP. She won't be able to use the mage's effect after you kill it respectively. The four mages and their powers are listed below:

Cruor (Blood): Cruor attacks with the spell Blood Barrage. When Nex uses Cruor's attribute, she will attack players with blood spells and drain their life points, healing herself in the process.

Umbra (Shadow): Umbra attacks with the spell Shadow Barrage. When Nex uses Umbra's attribute, her chamber will start getting darker. When it gets pitch-black, players will be hit for a lot of damage if they stand still and do not move.

Glacies (Ice): Glacies attacks with the spell Ice Barrage. When Nex uses Glacies' attribute, she freezes players, preventing them from moving for a preset period of time.

Fumus (Smoke): Fumus attacks with the spell Smoke Barrage. When Nex uses Fumus' attribute, she will occasionally create smoke clouds, causing poisonous magic damage to players nearby. A Facemask/Slayer helmet will not protect you from the smoke clouds.

After all the mages are down, Nex will start using Soul Split prayer.

Upon death, Nex will activate Wrath which will deal damage to anyone standing nearby.

Attacks

 * "Let the virus flow through you" - A cloud wich reduces your stats and spreads to players 1 square adjacent to you and deals some damage.
 * "NO ESCAPE!" - Nex will teleport and fly through one of the paths of the central symbol, disabling protection prayers.
 * "NOW, THE POWER OF ZAROS!" - She will activate Turmoil and switch between Deflect Melee and Soul Split.
 * "I Demand A Blood Sacrifice!" - A blood-barrage attack.
 * "Fear the shadow!" - Boss room becomes total darkness and if you're standing on the same place for ±1.5 seconds hits will deal 400-700 damage.
 * "Taste My Wrath!" - Upon death, Nex will activate Wrath, dealing damage to everyone around her.

Battle
Nex moves very quickly, she can jump across the room in 1 tick. Throughout the battle her 4 mages will be able to be killed as she gets damaged, and it is important to do this to disable her attacks. At around half health she will spawn several blood reavers which should be killed to avoid extra damage. Whenever these monsters are not being targeted everyone should focus on Nex. With 15-25 maxed people who know what they are doing, kills will be 10–15 minutes.

Nex has 5 phases, Smoke, Shadow, Blood, Ice and a desperate phase, all of her spells are based in the Ancient Magicks spellbook.

Smoke phase: She will use Smoke spells, this is the most dangerous phase since she can attack (which poisons for 88 life points) and at the same disable your prayers and stunning you in a very similar manner to the magical drag of Yk'Lagor the Thunderous, but she will not heal; in this phase, she will cast a Virulent cloud on the players, which lowers combat stats drastically and can be transmitted from player to player; after she reaches 4/5th of her life points and having Fumus killed she will go to the next phase.

Shadow phase: She will use Shadow spells, Nex has also 2 special abilities in this phase, she will lay "Shadow traps" on the floor, which if you step on (or don't move if one is under you) will hit you for over 500 life points of damage; her second special ability is to darken the room, it will be as dark as K'ril Tsutsaroth's chamber. If you stay without moving for a prolonged time, you will be dealt constant damage; after she reaches 3/5th of her life points and having Umbra killed she will go to the next phase.

NOTE: Starting from now Nex become incredibly weakened, leaving her with lower accuracy on her attacks.

Blood phase: She will use Blood spells wich will also heal her, she will also have 2 special abilities, the first one she will crouch and cover herself for a Syphon and summon various Blood reavers and any damage that was supposed to be dealt will heal her instead (if you hit a 200, she will heal 200 life points instead), she will also demand a "Blood sacrifice", in which a player will turn red (effects unknown); after she reaches 2/5th of her life points and having Cruor killed she will go to the next phase.

Ice phase: She will use Ice spells which target all the players and freezes them, however they don't do much damage if Protect from/Deflect magic is active, her special attack will lock a player in an ice prison with ice stalagmites that will surround him in a 1x1 square basis, any other players that are standing in the stalagmites when they appear will be dealt damage; after she reaches 1/5th of her life points and having Glacies killed she will go to the last phase.

Desperate phase: She will activate Turmoil and Soul split, she will also alternate between Deflect melee and no overhead, she will have increased Attack, Strength and Defence during this stage, her magic attack will also hit similar to the beginning of the battle, however she will not have any special attack.

About 1 second after Nex is killed, she will activate Wrath, but it has a bigger radius than the curse available to players.

Drops
Note: Data is based on a limited, small sample size, so the drops should only be used as a rough guide currently.

100% drop

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Weapons and armour

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Herbs

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Other

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Trivia

 * "Nex" is Latin for "murder" or "death";
 * "Umbra" is Latin for "Darkness" or "Shadow"
 * One of the twitter hints shows a plaque with the text: Vita brevis breviter in brevi finietur, Mors venit velociter quae neminem veretur, Omnia mors perimit et nulli miseretur, which is Latin for: "Life is short, it will end in a short time, Death comes quickly and respects no one, Death annihilates all and has pity on no one." This phrase is strongly connected to the phrase "memento mori", which means "remember your mortality."
 * The room layout is the symbol of Zaros.
 * If you look closely at the archway in the picture of the plaque mentioned above, you will see what seems to be the very top of the head of a green ghost. That is most probably the nature spirit Ashuelot Reis, serving as the banker in the area just before Nex's chamber.
 * Her combat level is 1001 and she was released on the 10th of January, which is written as 10/01 in most countries, such as England; in which Jagex is based in.
 * She is the first monster in RuneScape to have a combat level over 1000.
 * With 30,000 lifepoints she takes over the lead of the monster with the highest life points. The previous was the Corporeal Beast with 20,000.
 * Nex is currently the only monster in the game that uses an overhead prayer other than the protection prayers.
 * The Ancient Ceremonial Mask that Nex drops bears a resemblance to the mask worn by Phantom Ganon in Nintendo's "The Legend of Zelda: Ocarina of Time".
 * Nex is the only monster that drops Treasure Trails rewards as a drop; that being the Ancient armour set.