Epiphany

Walkthrough

 * Speak to Octavernost (K-9) in Western Adoulin.
 * Go to Outer Ra'Kaznar (M-6) and check the Meeting Point. You will receive Refined Ra'Kaznar fiber.
 * Return to Octavernost. He will offer you the choice of three challenges.
 * Choosing Iridal core of the tomb corresponds to a level 109 solo fight in Ranperre's Tomb.
 * Choosing Iridal core of the ruins corresponds to a level 125 party fight in Fei'Yin.
 * Choosing the blank option will give you the Iridal core of the pass. This corresponds to a level 135 solo Rune Fencer fight in Ranguemont Pass.

Ranperre's Tomb

 * Go to King Ranperre's Tomb (K-10) and examine the ??? in the middle of the west courtyard to enter map 2.
 * Go to (E-7) and check the Hazy Rune behind the Strange Apparatus. Check it again to begin the fight.
 * This is a solo fight. You do not need to have Rune Fencer set on main job to participate. Trusts are allowed for the fight, but Fellows are not. Buffs and TP will be reset.
 * Your enemy is Arcus Blades, an Animated Weapon.
 * Spams Dispelga.
 * Casts very potent tier-V and tier-VI Fire and Stone spells.
 * Uses Dire Whorl.
 * Upon defeating Arcus Blades you will earn 10000 bayld, and your Refined Ra'Kaznar fiber will become Arcus fiber.

Fei'Yin

 * Go to Fei'Yin. Enter map 2 at (G-9), then come back to map 1 at (E-7).
 * Go to (G-6) and check the Hazy Rune behind the Strange Apparatus. Check it again to begin the fight.
 * This is a party fight. You do not need to have Rune Fencer set on main job to participate. Trusts are allowed for the fight, but Fellows are not. Buffs and TP will be reset.
 * NM details

Ranguemont Pass

 * Location details
 * This is a solo fight for Rune Fencers only. Neither Trusts nor Fellows are allowed. Buffs and TP will be reset.
 * NM details

Finishing Up

 * Return to Octavernost.
 * Check Amchuchu's Laboratory (J-10) in Western Adoulin. You will lose your reward key item.
 * Wait one game day, then talk to Octavernost for your reward: 15000 XP and Erilaz Surcoat.

Armor/Fights

 * Speak to Octavernost to receive a new Key Item to repeat a fight. He likely gives a new KI once per Earth day, or once per Conquest Tally.
 * Speak to Octavernost to commission additional armor pieces.