Nex

Nex is the Zaros boss behind the Frozen door in the God Wars Dungeon released on 10 January 2011. She has over 15 unique combat moves. She is located in a multicombat area, and cannot be poisoned, like the rest of the God Wars dungeon. In the Behind the Scenes entry, Nex is described using the gender-neutral pronoun "it". However, upon release, Nex is revealed to be a "she."

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 following. 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 its 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 its imprisonment and this time it is up to the adventurer to contain it once again.

In order to even access Nex, you must access all of strongholds (but not boss room) of Armadyl, Bandos, Saradomin and Zamorak to retrieve a key part, effectively requiring 70 Agility, Constitution, Strength and Ranged 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.

Unlike the other bosses of God Wars Dungeon, there is a bank to refill on supplies before fighting Nex.

It is confirmed to include the z-buffer and particle graphics engineering styles to create one of the best boss sprites to date. It is also confirmed to have sound effects built in, to create a voice during the fight. Jagex claims that Nex will be the most challenging and rewarding boss to date, "You're going to need help from your clan or some friends to take it down, but huge riches await those who succeed."

Trivia

 * "Nex" is Latin for "murder" or "death"; "torva" is Latin for "savage" or "fierce".
 * 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 appears to be 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.
 * Nex is 156 levels higher then the corporeal beast