FactionsAssassin. Shadow Arts 12Shroud of DistressEnchantment SpellFor 54 seconds, if you are below 50% Health, you have 7 health regeneration and a 75% chance to block attacks.10145
EotNNo Profession. Deldrimor rank Dwarven StabilityEnchantment SpellFor 24..30 seconds, your Stances last 55..100% longer. If you activated this Skill while drunk, you cannot be knocked down. PvE only.5¼30
FactionsAssassin. Shadow Arts 12Unseen FuryStanceAll adjacent foes are Blinded for 9 seconds. For 26 seconds, you cannot be blocked by Blinded foes. 520
PropheciesNecromancer. Curses 16Spiteful SpiritElite Hex SpellFor 21 seconds, whenever target foe attacks or uses a skill, Spiteful Spirit deals 37 shadow damage to that foe and all adjacent allies of that foe.15210
PropheciesNecromancer. Curses 16Price of FailureHex SpellFor 30 seconds, target foe has a 25% chance to miss with attacks and takes 49 damage whenever that foe fails to hit in combat.15220
Required to be empty so that you can obtain the celestial Star Servant skill.
Optional 2
Reckless HasteFactionsNecromancer. Curses 16Reckless HasteHex SpellFor 12 seconds, target foe and all adjacent foes are Hexed with Reckless Haste. While Hexed, they attack 25% faster but have a 50% chance to miss with attacks.15112 — For Silent Ancient Onata
"Finish Him!"EotNNo Profession. Norn rank "Finish Him!"ShoutIf target foe has less than 50% Health, that foe takes 44..80 damage and suffers from Cracked Armor and a Deep Wound for 12..20 seconds. PvE only.1015 — For Sword Ancient Kai
Equipment
Spear/Axe/Sword of Enchanting with +5 Energy
Shield of Fortitude or Devotion with +10AR vs. Slashing.
Run to the first group and go to the corner (see video) and wait until the patrol passes.
Once they pass, run forward without grabbing their aggro and turn right.
There will be a patrol coming towards you. Before they get to you, cast Shroud of DistressFactionsAssassin. Shadow Arts 12Shroud of DistressEnchantment SpellFor 54 seconds, if you are below 50% Health, you have 7 health regeneration and a 75% chance to block attacks.10145, then DashFactionsAssassin. UnlinkedDashStanceFor 3 seconds, you run 50% faster.58 through with Dwarven StabilityEotNNo Profession. Deldrimor rank Dwarven StabilityEnchantment SpellFor 24..30 seconds, your Stances last 55..100% longer. If you activated this Skill while drunk, you cannot be knocked down. PvE only.5¼30 up. Keep running until they break aggro.
They may follow you a little bit, in which case, just keep running around until they do.
Once the aggro is broken, pull out your longbow and grab Silent Ancient Onata and pull it back away from the portal.
Try not to get too close to the portal or else more enemies will spawn. If they do spawn, try to avoid their aggro. If you grab their aggro, you may not be able to survive to kill the boss.
Once Silent Ancient Onata is near you, blind it with Unseen FuryFactionsAssassin. Shadow Arts 12Unseen FuryStanceAll adjacent foes are Blinded for 9 seconds. For 26 seconds, you cannot be blocked by Blinded foes. 520.
Then cast your Star Servant, then Spiteful SpiritPropheciesNecromancer. Curses 16Spiteful SpiritElite Hex SpellFor 21 seconds, whenever target foe attacks or uses a skill, Spiteful Spirit deals 37 shadow damage to that foe and all adjacent allies of that foe.15210, Price of FailurePropheciesNecromancer. Curses 16Price of FailureHex SpellFor 30 seconds, target foe has a 25% chance to miss with attacks and takes 49 damage whenever that foe fails to hit in combat.15220, and Reckless HasteFactionsNecromancer. Curses 16Reckless HasteHex SpellFor 12 seconds, target foe and all adjacent foes are Hexed with Reckless Haste. While Hexed, they attack 25% faster but have a 50% chance to miss with attacks.15112.
Once Unseen Fury recharges, cast it again. Silent Ancient Onata should be dead soon after. If not, recast your hexes.
Use a shout hero to give you a speed boost. Do not worry if the hero dies while running through the groups.
If the hero survives, flag it away from you before you aggro Sword Ancient Kai.
Using a Longbow, pull Sword Ancient Kai back away from the portal.
Try not to get too close to the portal or else more enemies will spawn. If they do spawn, run back towards the shrine and come back. Just wait until you get the opportunity again to pull Sword Ancient Kai.
Once Sword Ancient Kai is near you, blind it with Unseen FuryFactionsAssassin. Shadow Arts 12Unseen FuryStanceAll adjacent foes are Blinded for 9 seconds. For 26 seconds, you cannot be blocked by Blinded foes. 520.
Then cast your Star Servant, then Spiteful SpiritPropheciesNecromancer. Curses 16Spiteful SpiritElite Hex SpellFor 21 seconds, whenever target foe attacks or uses a skill, Spiteful Spirit deals 37 shadow damage to that foe and all adjacent allies of that foe.15210 and Price of FailurePropheciesNecromancer. Curses 16Price of FailureHex SpellFor 30 seconds, target foe has a 25% chance to miss with attacks and takes 49 damage whenever that foe fails to hit in combat.15220. Maintain Unseen Fury.
Sword Ancient Kai will use Healing SignetCoreWarrior. Tactics Healing SignetSignetYou gain 82..154..178 Health. You have -40 armor while using this skill.24 once its health gets low. As it is casting Healing Signet, and its health is low enough, use "Finish Him!"EotNNo Profession. Norn rank "Finish Him!"ShoutIf target foe has less than 50% Health, that foe takes 44..80 damage and suffers from Cracked Armor and a Deep Wound for 12..20 seconds. PvE only.1015.
You may need to recast another set of hexes to kill it.
Counters
Bad boss spawn.
Aggro the enemies at the portal.
Late blinding of enemy.
Using the Celestial Summon too close to spirits of Famine.
Notes
A complete run to either boss takes about 3 minutes from the start.
Bring lockpicks.
There is a chance of a chest spawning in two locations in the area of Silent Ancient Onata.
There is a chance of a chest spawning on the way to and around the area of Sword Ancient Kai.