The Oculus is a 5-man wing of the Nexus in Coldarra (a subregion of Borean Tundra in Northrend) designed for level 80 players. The Oculus is a tower of "magical rings" that float above the ground and the first instance to allow players the use of certain flying mounts. The gate of the oculus is located directly above the nexus gate, requiring the rampway to reach.
Now Malygos uses the Arcanomicon to locate and tap into the ley lines, diverting the magical powers that course beneath the earth to his home base in Northrend, the Nexus. Once harnessed, the energies are focused through the Nexus' ascending rings and blasted into the Twisting Nether. Malygos' redirection of the ley lines has carried disastrous consequences, however – splintering the world's crust and opening unstable rifts: tears in the very fabric of the magical dimension.
Players start by fighting around the rings and then teleport up a short distance in order to choose a drake. These drakes allow you to fight in the air while progressing through the instance. There are three different drakes, each with its own special abilities. Which drake you choose is independent of your character, for example: a healer may choose to use a tanking drake.
[Searing Wrath]ωϖ—Breathes a stream of fire at an enemy dragon, dealing 6800 to 9200 Fire damage and then jumping to additional dragons within 30 yards. Each jump increases the damage by 50%. Affects up to 5 total targets. Instant.
[Evasive Aura]ωϖ—Allows the Ruby Drake to generate Evasive Charges when hit by hostile attacks and spells. Instant. Passive.
[Evasive Maneuvers]ωϖ—Allows your drake to dodge all incoming attacks and spells. Requires Evasive Charges to use. Each attack or spell dodged while this ability is active burns one Evasive Charge. Lasts 30 sec. or until all charges are exhausted. Instant. 5 second cooldown.
[Martyr]ωϖ—Redirect all harmful spells cast at friendly drakes to yourself for 10 sec. Instant. 10 second cooldown. This ability is only available during the final boss encounter.
[Shock Lance]ωϖ—Deals 4822 to 5602 Arcane damage and detonates all Shock Charges on an enemy dragon. Damage is increased by 6525 for each detonated. Instant.
[Stop Time]ωϖ—Halts the passage of time, freezing all enemy dragons in place for 10 sec. This attack applies 5 Shock Charges to each affected target. Instant. 1 minute cooldown
[Temporal Rift]ωϖ—Channels a temporal rift on an enemy dragon for 10 sec. While trapped in the rift, all damage done to the target is increased by 100%. In addition, for every 15,000 damage done to a target affected by Temporal Rift, 1 Shock Charge is generated. Channeled. This ability is only available during the final boss encounter.
[Leeching Poison]ωϖ—Poisons the enemy dragon, leeching 1300 to the caster every 2 sec. for 12 sec. Stacks up to 3 times. Instant.
[Touch of Nightmare]ωϖ—Consumes 30% of the caster's max health to inflict 25,000 nature damage to an enemy dragon and reduce the damage it deals by 25% for 30 sec. Instant. 10 second cooldown.
[Dream Funnel]ωϖ—Transfers 5% of the caster's max health to a friendly drake every second for 10 seconds as long as the caster channels. Channeled. This ability is only available during the final boss encounter.
Hotfix (2010-01-05): "To encourage players not to shy away from the many invigorating adventures to be had in The Oculus, we will apply a change to enhance the rewards players are provided when selected for this dungeon via the Random Heroic option in the Dungeon Finder. Once Ley-Guardian Eregos is defeated, one loot bag per character will be provided in his chest in addition to the current rewards. Each loot bag will offer players rare gems, two additional Emblems of Triumph, and a chance of being rewarded the [Reins of the Blue Drake]. These fine treasures could be yours should you honor your fellow party members by besting the challenges contained within The Oculus! Keep in mind, however, that these extra loot bags will only be awarded to each party member if Oculus is selected by the Dungeon Finder when players choose the Random Heroic option. In light of this change, the [Reins of the Azure Drake] will have a chance of dropping in both 10- and 25-player versions of The Eye of Eternity."