This article is about the 5-man instanced dungeon. For the Borean Tundra sub-zone, see Nexus.
The Nexus loading screen
The Nexus bosses
The Nexus is a level 71-73 wing of the Nexus dungeon hub in the Borean Tundra.
The dungeon layout is very open. You can go into different "wings", but the final boss, Keristrasza, a captured red dragon, can only be freed from her ice prison when you kill the previous three bosses.
To get there, you need to ride to
Amber Ledge in northwestern Borean Tundra. A dragon will then fly you over to Coldarra. The entrance to the dungeon is somewhat hidden at the bottom of the rifts in the middle of Coldarra. Just go down, and when you see the Arcane Serpents, you are there.
In Patch 4.2
Patch 4.2, the Nexus is part of a new legendary quest line for those seeking . A new map has been provided for completing the quest [Dragonwrath, Tarecgosa's Rest ]  .
Through a Glass, Darkly
Heroic mode; Optional
Alliance or Horde forces
Going straight to Grand Magus Telestra from the Entrance, you will come across a hallway of Alliance or Horde forces that have been frozen in place by the blue dragonflight. The forces you encounter will always be the opposite of the force you are allied with (Alliance will always find frozen Horde and vice versa).
Alliance Commander Horde Commander
Battle Shout: Increases the melee attack power of nearby allies for 2 minutes.
Charge: Charges an enemy, inflicts increased damage, and stuns target for 2 seconds. Whirlwind: Inflicts 200% damage to all enemies within 8 yards. 2 second cast. Spawns on Regular Difficulty only, in place of Horde Commander Kolurg or Alliance Commander Stoutbeard
Alliance Berserker Horde Berserker
Bloodlust: Increases an ally's attack speed by 30% for 30 seconds.
Frenzy: Increases personal attack speed by 15% for 2 minutes. Stacks. War Stomp: Inflicts increased damage and knocks back everybody within 10 yards.
Alliance Ranger Horde Ranger
Incendiary Shot: Inflicts fire damage and leaves a fire DoT effect. Rapid Shot: Channeled effect that increases firing speed for 8 seconds.
Alliance Cleric Horde Cleric
Flash Heal: Heals a single ally. 1.5 second cast.
Power Word: Shield: Absorbs X damage on a single ally and prevents spell pushback. Shadow Word: Death: Inflicts equal damage to the caster and enemy target.
Cleave: Inflicts increased damage against up to 3 enemies. Mortal Strike: Inflicts increased damage to one enemy and reduces healing received by 50% for 5 seconds. Dragonkin
Arcane Shock: Inflicts Arcane damage to one enemy and leaves an Arcane DoT for 12 seconds. Frostbolt: Inflicts Frost damage to one enemy and reduces movement speed. Dragonkin
Arcane Blast: Inflicts Arcane damage to one enemy. Heal: Heals one ally. Dragonkin
Mana Shield: Damage received reduces caster's mana instead of health. Silence: Silences enemy for 5 seconds. Dragonkin
These are mostly for aesthetics and do not engage players
Mage Hunter Ascendant
Arcane Explosion: Inflicts Arcane damage to all enemies within 10 yards.
Polymorph: Polymorphs one enemy for 8 seconds. 1.5 second cast.
Arcane Trap: Inflicts Arcane damage to all enemies within range of the trap.
Fireball: Inflicts Fire damage to one enemy. 40 yard range.
Rain of Fire: Inflicts Fire damage to all enemies in 8 yard target area for 9 seconds. Channeled.
Immolation Trap: Inflicts Fire damage to first enemy to trigger the trap.
Frostbolt: Inflicts Frost damage to one enemy, slowing movement speed. 20 yard range.
Cone of Cold: Inflicts Frost damage to all within 10 yards in front of the caster, slowing movement for 8 seconds.
Freezing Trap: Freezes first enemy to trigger trap for 20 seconds. Aura of Arcane Haste: Increases own casting speed and spell damage for 1 minute. Humanoid
Mage Hunter Initiate
Drain Mana: Drains target's mana for 5 seconds. Channeled.
Magic Burn: Inflicts Arcane damage and leaves Arcane DoT lasting 21 seconds. 2 second cast. Renew: Heals ally over 15 seconds. Humanoid
Arcane Torrent: Silences all enemies within 10 yards for 4 seconds. Spellbreaker: Inflicts damage to one enemy and reduces spell damage by 75% for 6 seconds. Humanoid
Draw Magic: Increases own damage by 50%. Lowers damage/healing of enemies within 12 yards by 225. Spell Lock: Counters and/or silences enemy spell caster for 4 seconds. 30 yard range. Demon Groups of two patrol with one Mage Hunter.
Ormorok and his creations were probably captured and put into the Nexus to serve as one of the guards. They were subjected to massive amounts of Arcane energy. Over time, they corrupted. Now, they possibly serve Malygos and the Blue Dragonflight, whether they like it or not.
Aura of Regeneration: Heals caster and nearby units while encased in Seed Pod.
Ensnare: Seed Pod: Cast on death. Removes caster from combat and becomes untargettable. Releases caster when fully healed. Elemental
Non-elite. Will not completely die until Ormorok is slain.
Crystal Bark: Crystal Strike: Elemental
Shard Spray: Thunderclap: Elemental
Toughen Hide: Tranquility: Humanoid
Rift Spawn consist of Arcane elementals that have emerged in The Nexus due to the intense energies being gathered. Anomalus leads them and currently, they are all out of control. The Blue Dragonflight is attempting to fight them back.
Chaotic Energy Burst: Inflicts Arcane damage to one target and two nearby enemies. Spawns non-elite Crazed Mana-Wraiths
Arcane Nova: Damages enemies and heals Arcane allies within 10 yards.
Loose Mana: Restores mana over time to enemies and allies within 30 yards. Occurs after Mana-Surge's death. Mana Burn: Consumes target's mana and inflicts damage.
Arcane Missiles: Inflicts Arcane damage to one enemy. Non-elites that spawn from Chaotic Rifts
These are mostly for aesthetics and do not engage players
Main article: The Nexus Loot
All Bosses - Paladin Tanking Perspective
New map added for legendary staff quest line. (2011-06-28): Patch 4.2.0 (2010-01-02): Patch 3.3.2 Anomalus will now use the Create Rift ability only once, down from 3 times.