AION 2: Full Elyos Walkthrough for The Past Behind the Sealed Barrier (Chapter 4)

Chapter 4 of the Elyos storyline takes place entirely in Verteron, and it turns into a drawn-out detective case across Tolbas Forest. You start by trying to earn the trust of a Shugo merchant leader, get pulled into a kidnapping, chase a band of traitorous mercenaries, and finally break into a sealed Aullaeu altar to uncover what High Priestess Reda has been doing with Scarlotus. There are 16 Episode quests, and they run back to back with no branching.

Quick answer: Play all 16 quests in order from Mutual Benefit to Secrets Within Secrets. Recommended levels run 24 to 30, every quest is in Verteron, and the full chapter pays out 22,448,495 XP plus the chapter completion title.

Meeting Kochi and the kidnapping

The opening three quests introduce the Wind Breeze Merchants, set up the crime, and hand you your first clue. Caelid gives all three, and the goal is simple at first: get the Shugo merchant chief Kochi to talk, since he has dealings with Reda.

Mutual Benefit

Mutual Benefit starts and ends with Caelid. Kochi distrusts Daeva, so Bao offers an introduction in exchange for an escort job. As Caelid puts it before you set off, “We’re finally meeting the famous Kochi.”

Speak with Bao at the encampment to begin escorting the merchant convoy toward the Northern Shugo Station. Load the goods and start moving.

Episode 4 Journal — The Journal objective for Mutual Benefit sends you to the Northern Shugo Station to find Bao. Image: NC / via @AyinMaiden

The convoy is ambushed by Aullaeu at the river crossing after the bridge is destroyed. Clear out the Chaser and patrol units, then regroup with Bao at the Northern Shugo Station.

Aulraeu Ambush — The Aullaeu spring an ambush at the river crossing during the escort, so clear them before pushing on. Image: NC / via @AyinMaiden

Head to the Wind Breeze Merchant HQ and talk to Kochi. When Scarlotus comes up, Kochi loses his temper and orders the Dawn Legion to leave.

Go back to Bao. He recommends collecting rare Gravi Herbs as a way to gain Kochi’s favor. The quest ends here, and Shugonapped becomes available.

Completing Mutual Benefit — Mutual Benefit completes and Caelid passes you Shugonapped to keep chasing a way to Kochi. Image: NC / via @AyinMaiden

Shugonapped

Shugonapped starts and concludes with Caelid stationed outside Kochi’s Quarters. Since Shugo frequently trade Gravi Herb, you collect the plant as a peace offering, but discover Kochi is missing.

Defeat 8 Tolbas Gravi and Tolbas Magic Gravi in the forest to collect the Gravi Herb.

Carry the herbs back to the Wind Breeze Merchant HQ.

Enter Kochi’s Quarters to check the situation. The tent is ransacked, Kochi is gone, and the Shugo immediately blame the Aullaeu.

Return to Kochi's Quarters — Kochi's tent is torn apart when you return with the herbs, the first sign of the kidnapping. Image: NC / via @AyinMaiden

Inside, a human mercenary’s weapon is left behind among the mess, which shifts suspicion away from a simple Aullaeu raid. The scattered notes and a weapon shop receipt are what point Caelid toward following the blade.

Investigating Quarter Documents — Reading the documents left in the tent, including the Mysterious Note, builds the case for the mercenary lead. Image: NC / via @AyinMaiden

Finding Kochi

Finding Kochi is assigned by Caelid and completed with Bao. The Aullaeu and Shugo have been rivals for a long time, so begin by checking the Aullaeu’s northern base. Enter the Northern Tolbas Forest, destroy 2 Aullaeu Defense Totem, defeat 6 Tolbas Konutin Seeker and Tolbas Konutin Worker, then inspect the Weapon Remnants twice. Their weapons look like the one found in the tent, but differ from it, leaving the culprit unidentified.

Completing Finding Kochi — The Finding Kochi summary confirms the camp weapons are human-made but do not match the blade from the tent. Image: NC / via @AyinMaiden

Chasing the Astin Mercenaries

The trail now leads to a mercenary company that once worked for Kochi. These five quests expose a double-cross and end with the leader captured.

Mercenary Pursuit

Mercenary Pursuit is handed over by Arin and turned in to Astin. Arin reports that mercenaries caused trouble at the Southern Shugo Station, and they turn out to be the Astin Mercenaries, who previously had a contract with Kochi. Talk to Caelid to head to the Southern Shugo Station, where you fight off the attackers and interrogate a captured mercenary, learning Astin’s location and that he holds no goodwill toward the Shugo despite his deal.

Weapon’s Owner

Weapon’s Owner is given by Astin and turned in to Baison. Astin refuses to cooperate and even drops a veiled threat, so you question the rank and file instead. Talk to Carter, then talk to Jade. During the questioning, a disillusioned founding member named Baison offers to trade information for a favor. As he admits, “I’m sick of doing Astin’s dirty work.”

Best Served Cold

Best Served Cold starts and finishes with Baison. He asks you to raid Astin’s hidden cache in return for his help. Enter the Secret Storage, defeat the monster-like creature guarding the area, and retrieve the trade ledger. Once you deliver it, Baison provides the information.

Hidden Scheme

Hidden Scheme is given by Baison and turned in to Caelid. The ledger reveals Astin never meant to pick a side in the Shugo-Aullaeu feud, and that most of his dealings happened in the Night Dew Cave.

Investigate the Night Dew Cave, where you find Shugo corpses, Aullaeu sorcery residue, and records of an unknown transaction.

Return to Astin’s base.

Talk to Jade to try to pin down where Astin has gone.

Head to the Southern Shugo Station and talk to Bao, who has heard the betrayal for himself.

Defeat 8 Astin Mercenaries from across their ranks (Ambusher, Marauder, Poacher, Scout, Seeker, and Watcher) to retrieve the stolen supplies.

Deliver the recovered supplies to Bao. A document from the cave points to a meeting between Astin and the Aullaeu, so an ambush is planned.

Crime Scene

Crime Scene is given by Caelid and turned in to Bao. Go to the Illicit Trade Spot at the appointed time. Astin and the Aullaeu are caught discussing the sale of captured Shugo, and the ambush lets you take Astin alive. Kochi himself, however, has already been moved elsewhere. Caelid’s order going in is clear: “Remember, we need Astin alive. He’s the only way to find Kochi.”

Infiltrating the Aullaeu Village

With Astin caught, the truth lands: the Aullaeu took Kochi, and Kochi had been supplying Reda with Scarlotus materials. These three quests cover the disguise, the search inside the village, and the rescue.

Thorough Preparation

Thorough Preparation is given by Bao and turned in to Caelid. Rather than storm the village, you prepare a transformation disguise and gather intel. Bao warns that the perimeter is defended with sorcery totems.

Destroy an Aullaeu Sorcery Totem to clear the way toward the village.

Talk to Bao at the Aullaeu Village Border.

Read the Aullaeu Orders to understand what is happening.

Gather the transformation materials by collecting drops from an Aullaeu Village Guard, looting the Goods Basket twice, and collecting drops from an Aullaeu Apprentice Shaman. This search also turns up fresh word of Kochi.

Shugo Tracks

Shugo Tracks is given by Caelid and turned in to Bao. Aullaeu command papers say Kochi is held in the Root Cellar, so you slip inside disguised.

Talk to Caelid to transform into an Aullaeu.

Ask around the village by talking to the Aullaeu Sentinel and the Aullaeu Trainee.

Read the three scattered Aullaeu Guard Logs.

Head to floor two of the residence and try to rescue the Shugo. The caged Shugo you attempt to free perish, but reveal where the Root Cellar is before they die.

Shugo in the Cellar

Shugo in the Cellar comes from Bao and is completed with Kochi. Beneath a giant tree to the east, the Root Cellar is protected by numerous explosion totems. Meet Caelid outside the Root Cellar, then enter and rescue Kochi, with every Dawn legionnaire contributing. Kochi is safe, though shaken. As he says while leaving, “This place is too dangerous, nyerk. Let’s move somewhere else!”

The sealed altar and Reda’s secret

Kochi finally explains what Reda was doing, and the last five quests open the sealed underground altar to confirm it. Chief Aulamus locked the altar, so you need another way in.

Exiled Aullaeu

Exiled Aullaeu is given by Kochi and turned in to Daki. Kochi admits he helped Reda gather Scarlotus materials, and that she experimented at the Aullaeu’s underground altar to bring her dead daughter back to life. Since Aulamus sealed the altar, Kochi points you toward Holyaul, Aulamus’s exiled rival.

Contact Luteros over the Selvis to pass along the location.

Meet up with Kochi at the Abandoned Wind Breeze Office.

Head for the Forest of Exiles, defeating 3 Wandering Aullaeu Brawler, 4 Wandering Aullaeu Swordsman, and 2 Wandering Aullaeu Ranger along the way.

Holyaul Rescue Operation

Holyaul Rescue Operation is given by Daki and turned in to Kochi. Daki shares what he knows, and Holyaul agrees to break the altar’s seal if you free him first. Commence the rescue to get Holyaul moving. The escape route is rigged with Aulamus’s traps, and Holyaul is killed by a spell before he can help, so the only remaining option is to steal Aulamus’s key.

Battle Enhance Scroll (Bound). Image: NC

Aulamus’s Key

Aulamus’s Key is given by Kochi and turned in to Caelid. Phernos is determined to confirm something about Reda, so you hunt down Aulamus for the key.

Clear the area by defeating 3 Wandering Aullaeu Warrior and 6 Sparkie (Aullaeu Forest Giant Sparkie and Aullaeu Forest Sparkie).

Clear the sorcery field by defeating 8 Aullaeu Bodyguard, Aullaeu Intermediate Shaman, and Aullaeu Superior Shaman, then destroy the Aullaeu Sorcery Totem.

Talk to Phernos after Aulamus is subdued. Faced with Phernos’s resolve, Aulamus hands over the key to the altar.

Secrets of the Altar

Secrets of the Altar comes from Caelid and is completed with Caelid. Unlock the Aullaeu Altar with the key, then discuss your discoveries with Phernos. The altar holds corrupted Aullaeu and summoned wraiths, along with a photo of Teina, Reda’s daughter. Reda brought her back to life with Scarlotus, and Phernos vows to reclaim the Core from her by any means necessary.

Secrets Within Secrets

Secrets Within Secrets is given by Caelid and turned in to Nania, and it closes the chapter. Reda’s trail leads to Altamia Canyon, home of the Notos Legion, but Kochi flags one last problem in Tolbas Forest: the Urugugu tribe, Aullaeu who now worship Dragon Lord Ishtar.

Talk to Kochi about the new threat.

Return to the Wind Breeze Merchant HQ and talk to Kochi again.

Go to the Urugugu Canyon Entrance and talk to Sami.

Enter and investigate Urugugu Canyon. Finishing here sets up the move to the Notos Legion and the next quest, An Uneasy Alliance.

All chapter 4 quest rewards

Every quest pays Kina (Bound) and XP, with most also dropping a piece of the Wind Breeze armor set or a batch of scrolls. The XP across all 16 quests adds up to 22,448,495.

Quest	XP	Kina (Bound)	Other reward
Mutual Benefit	601,603	12,000	Wind Breeze Gloves x1
Shugonapped	601,603	12,000	Life Serum (Bound) x20
Finding Kochi	601,603	12,000	Wind Breeze Boots x1
Mercenary Pursuit	601,603	12,000	Power Shard (Bound) x1,000
Weapon’s Owner	601,603	12,000	Wind Breeze Breastplate x1
Best Served Cold	849,322	13,000	Wind Breeze Greaves x1
Hidden Scheme	849,322	13,000	Courage Scroll (Bound) x20
Crime Scene	849,322	13,000	Wind Breeze Cloak x1
Thorough Preparation	1,079,138	14,000	Status Effect Resist Scroll (Bound) x5
Shugo Tracks	1,567,939	16,000	Wind Breeze Guard x1
Shugo in the Cellar	1,992,205	17,000	—
Exiled Aullaeu	1,992,205	17,000	Benediction Scroll (Bound) x20
Holyaul Rescue Operation	1,992,205	17,000	Battle Enhance Scroll (Bound) x2
Aulamus’s Key	2,756,274	18,000	Wind Breeze Pauldrons x1
Secrets of the Altar	2,756,274	18,000	Wind Breeze Helm x1
Secrets Within Secrets	2,756,274	18,000	Aullaeu Wings (Bound) x1

How to know the chapter is done

Hand Secrets Within Secrets to Nania to finish Chapter 4. The journal then moves to Episode 5, Two-Faced, which opens with An Uneasy Alliance. Complete all 16 Episode quests to earn the The Past Behind the Sealed Barrier title through its associated achievement, along with 36,000 Kina (Bound) and 5 Life Crystal (Bound). Worn, the title grants Critical Attack +17; adding it to your title collection contributes Accuracy Bonus +5 to the collection bonus.

Reward and Level Reference for Thorough Preparation and Secrets Within Secrets

Two quests in Chapter 4 sit at opposite ends of the Verteron run: Thorough Preparation, where the Aullaeu Village push begins, and Secrets Within Secrets, the last quest of the chapter. Here is what each one asks of you and pays out.

Detail	Thorough Preparation	Secrets Within Secrets
Given by	Bao, Eastern Shugo Station	Caelid, Aullaeu Village Border
Turned in to	Caelid, Aullaeu Village Border	Nania, Wind Breeze Merchant HQ
Recommended level	26	30
XP	1,079,138	2,756,274
Kina (Bound)	14,000	18,000
Item rewards	Status Effect Resist Scroll (Bound) x5	Aullaeu Wings (Bound) x1
Next quest	Shugo Tracks	An Uneasy Alliance

Secrets Within Secrets has four steps: two conversations with Kochi, a conversation with Sami, and an interaction with the Urugugu Canyon Entrance. Kochi explains that the Urugugu, a group of Aullaeu who once followed Tiamat, now worship the Dragon Lord Ishtar and are building an altar at Urugugu Canyon. After the quest, Caelid, Phernos and Nania head for Zumion Village to ask the Notos Legion for help.

All of it takes place in Verteron, which has 61 teleport statues and 15 rifts. The region also holds 2 monoliths and 85 dungeon entrances if you want to take detours between quests.