Persys, Primordial Ruin

Persys, Primordial Ruin is a Vex Wyvern Axis Mind of the Sol Divisive encountered as the final boss of the Spire of the Watcher Dungeon. It is one of the two Sol Divisive minds sent by The Witness to infiltrate the Ares Spire and send it into overload after stealing its data.

Gameplay
Upon reaching the reactor core of the Ares Spire, the Guardian will see Persys attempting to overload the reactor. Any stray shot hitting its chassis or getting too close will instigate the encounter, causing Persys to turn around and begin approaching the team. Upon Persys entering the main room, the door it came through will shut and Vex reinforcements will arrive, which includes legions of Goblins, flocks of Supplicants, and two Incarcerator Hydras, one being on each side. Upon the destruction of the Hydras, Conduit Minotaurs will begin spawning where the Hydras spawned. These must be destroyed to get the "Arctrician" buff. Then the Guardian(s) with the buff must quickly shoot all five nodes for the red wires, with four being on each of the four main pillars and the fifth being right above the gate where Persys walked through at the start. Upon completion of this, the gate and the yellow wire nodes will open. Two yellow wire paths must be completed, and upon completion, the reactor will begin purging. Persys must be lured into the reactor core room, or the purge sequence will deactivate. Doing this before completion of the second yellow wire path is advised.

While Persys is in the core room, the red nodes will open again, allowing them to be shot and the gate to once again be closed, sealing Persys inside. Once the core finishes charging and begins to purge, Persys will be forced to absorb the dispersed radiation, deactivating its shield and dealing minor damage to it, along with causing the gate to open again. Persys will then begin to charge the team, now vulnerable, for about ten seconds before it reactivates its shield and the cycle repeats until it is destroyed.

Strategies
The biggest threat of Persys' encounter is rarely Persys itself, more the small army it summons. The use of crowd control weapons like Malfeasance, Osteo Striga, and Witherhoard are heavily recommended. Along with easy access to healing and invisibility such as through the Echo of Obscurity aspect on the Void subclasses which allows for invisibility on a successful finisher. Combining this with Echo of Starvation, which grants Devour upon picking up an Orb of Power and a weapon that matches a Siphon helmet mod will ensure constant lost health recovery, however burst damage such as from Hydra and Minotaur Torch Hammers and Persys' own Warp Lances can be an issue.

Unlike most of the dungeon, one cannot take their time with this encounter as the constant Supplicant flocks causing immense damage and Goblins preventing passive health regen cause losing less through failure to do the mechanics, but instead through attrition. Speed and evasion is key to avoiding the Supplicants and Persys' gravity slam. Void weapons are the most useful as Minotaurs are the only elementally shielded enemy in this encounter so a void shotgun or The Enigma, a Void elemental glaive, are very useful for tearing through a Minotaur before they wipe one's health out with their torch hammers and warp smashes.

To damage Persys, there are various strategies employable depending on character class. Due to the short damage phase, slow but high damaging weapons like Sleeper Simulant, Gjallarhorn, and others are not easily advised. Instead, legendary linear fusion rifles, aggressive frame sniper rifles, and machine guns are more useful to maximize damage. However, if a Warlock or Titan is on the team, they can use Well of Radiance or Ward of Dawn respectively to ensure a full health team can damage Persys with swords like The Lament, The Other Half, and Quickfang. However, this strategy is more risky as Persys' Temporal Shockwave does enough damage where it may out-damage these sources of protection, along with it occasionally moving too far away from the protection for swords to be viable. If playing as a Warlock, one might utilise Fusion grenades, a Clown Cartridge rocket launcher and a Well of Radiance to maximum effect. Throwing both Fusion grenade charges, then firing the rocket launcher while within the Well, should provide enough Empowered damage to recharge at least one Fusion grenade. Alternating between throwing grenades, reloading and firing the rocket launcher will allow easy damage to be performed.

Gallery
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Trivia

 * Persys' name derives from the Greek Titan Perses, who was the Titan of destruction.
 * Persys is the first Sol Divisive Wyvern encountered so far throughout the Destiny series.

List of appearances

 * Destiny 2:
 * Season of the Seraph