[Octopath Traveler 0]Complete strategy guide for 8 types of sacred treasures: From collecting the keys to the Zenfu Crest to defeating the powerful master's phantom boss! A thorough explanation of how to complete a mid-game unparalleled party by obtaining the 8 most powerful legendary weapons at once[Octra 0 Heroic Spirit Island Lv60 Trial]

In Octopath Traveler 0 (hereinafter referred to as Octopath 0), the most powerful equipment that can dramatically change the battle from the mid-game onward is the legendary “8 Sacred Treasures.” By clearing this quest “8 Sacred Treasures”, you can obtain 8 types of ultra-high-performance weapons: swords, spears, daggers, axes, bows, fans, canes, and books. These weapons not only have high attack power, but also have special effects that revolutionize the strategy of the entire party. For example, it covers a variety of roles, from fuel-efficient types such as “Book of the Sun'', which reduces SP consumption by 25%, and “Staff of Order'', which automatically recovers SP every turn, to “Sword of Lightning'', which increases the number of attacks, and “Ax of the Spirit Tree'', which strengthens the power of all attributes.

In this guide, we will comprehensively explain everything from the quest occurrence conditions, detailed routes to obtain all 8 types of Seal Keys (Wind Gate Keys), how to access the Heroic Spirit Island, all behavior patterns and defeat template party of the boss “Illusion of the Great Martial Master”, detailed performance of the weapons to be obtained, and optimal build examples, so that everyone from beginners to experts can clear the quest without fail. This is a test recommended for level 60, but if you prepare properly and follow the route, even a growing party can successfully complete the challenge. By actually having these weapons, the transition to dungeons, arenas, and even end-game content will be much smoother.

1. Overview and prerequisites for the 8 types of sacred treasure quests: Why you will fail if you try without knowing this

Octora 0's “8 Sacred Treasures'' is a highly difficult content that occurs as a side quest in the Tower of the Heroic Spirit Island. The recommended level is 60, the shield value for boss battles is very hard at 20, and the biggest difficulty is the special specification where the weak point attribute changes dynamically. As a clear reward, you can unlock and obtain legendary weapons one by one by inserting the Seal Crest Key into the eight pedestals, and eventually collect all of them. The appeal of this quest is that you can fully strengthen your party's equipment slots at once by collecting them all at once. Normally, it would be inefficient to aim for these weapons individually, but since you can get them all at once here, it is the best solution for the middle game.

Required prerequisites

First, clear the conditions necessary for the quest to occur.

• Obtaining the ship “Queen Orsa”: Obtain the ship by completing the side quest “Queen Orsa” in Rippletide. Now you can sail the Middle-earth Sea (Danger Level 20) and the Open Sea (Danger Level 39-50). The standard route to obtain a ship is to proceed with the reconstruction of a nameless town and clear events related to Hydne.
• Recruit Viator: Required by some sources and affects quest occurrence. Viator is an evasion specialist and is useful in boss fights.
• Town build progress: Prioritize strengthening churches, training centers, and bases based in nameless towns. Collect blue torch stones to unlock “anywhere travel” and increase your travel efficiency. Torch stones can be obtained from the Granport tool shop (approximately 15,000 leaves) and the story “The Bestower of Wealth Chapter 3”.
• Recommended party level: 55-60. Earn experience points in the arena and gather supporters.

If you neglect these, you will lose several hours just collecting keys. With advance preparation, you can complete the entire quest within 2-3 hours.

Why should you attack now?

Breaking through the stagnation in the midfield. It has better special effects than the veteran series weapons, and when combined with Breakthrough the Damage Limit (after joining Olberic), it can deal 99,999 damage in a row. Proceeding in parallel with Town Build will maximize efficiency.

2. Complete collection route for all 8 types of seal keys: Collect them all and go straight to the boss battle

The main part of the quest is a collection of 8 types of Seal Crest keys. Each key corresponds to a specific weapon pedestal, and can range from dungeon treasure chests, NPC begging/purchasing, sub-quest rewards, and items lost on the open sea. Below, we will explain the efficient collection order and detailed route with map images. The required time is approximately 1 hour after obtaining the ship.

Collection priority order: Land → Sea area

1. Dagger Key (Serpent's Den): A treasure chest to the left of the center of the Serpent's Den dungeon in North Syatopolis Plains. The enemies are snake-type, and their weak points are spears and fire. Around level 40 is OK.
2. Sword Key (Valore/Valore): Reward for clearing the Viator companion quest “Meeting with Victor.” Explore around Valore Boulevard.
3. Ax Key (Victor Hollow): Purchased (several thousand leaves) from a fledgling antique dealer in the center. Check stock.
4. Key to the Book (Cave of Hot Water/Cave of Hot Water): A treasure chest on the center right from Death Valley via the Belcane Mountain Pass. Be careful of high temperature gimmicks and must have wind attributes.
5. Fan Key (Suhratarja): Use the “beg” command from the explorer who is chasing the mystery near the inn. Obtained after the conversation event.
6. Spear Key (East of Kojima in the Open Sea): Take a boat from Rippletide to the center of the Open Sea and pick up the fallen items. The danger level is 50, and the enemy is a ferocious ice element (weakness: spear, fire, lightning, wind). There is also a gold earring in the treasure chest.
7. Cane Key (Grandport): Ask for it from the black market merchant (black market merchant in the port town) on the upper right side of the street stall. Increase your success rate by recommending Hydne membership.
8. Bow Key (East Shifro Riverbank): Treasure chest at the bottom left of the left exit of Doniesk. Riverbank enemies are water-based, and use bows to clean up small fish.

Key for character creation: One can be obtained automatically at the beginning. Don't forget to check.

Tips for collecting all keys: Add Hydne to strengthen begging and stealing. Strengthen the cauldron with cyanite and retry with travel. Once you've collected everything, head straight to the Isle of Heroic Spirits.

3. Heroic Spirit Island access and quest generation: Notes on sailing

The Isle of the Heroic Spirits is located in the northwest of the Middle Earth Sea, just before the open sea, heading north by boat from Ripultide Port. It has a danger level of 49 and there is a small island in the Middle Earth Sea (Thunder Spirit Stone Treasure Chest) nearby. After arriving on the island, examine the door of the tower and you will find “8 Sacred Treasures.'' This will not occur if you are not a member of Viator.

Navigation Tips: The enemy in the open sea is the ferocious Great Birdian of the Rough Sea II (weak to axes, bows, books, and lightning), so give priority to avoidance. It also serves as material collection in ship automatic battle.

4. Complete guide to the powerful master's phantom boss: unknown weak points gimmick and all movement patterns

Boss “Illusion of the Great Master”: HP 195,470, Shield 20. There are no weak points displayed, and the basic weapons are swords, axes, fans, fire, and lightning, but they change by changing weapons (trying from spear to bow, etc.). Bleeding damage passes, but it's inefficient.

whole behavior pattern

• Normal attack: Performs an all-out attack for each weapon (sword: multi-stage slash) or a single high-firepower attack.
• Weapon change: Shifts weaknesses. Prepare multiple attribute breaks before breaking.
• Physical/Attribute Counterattack: Activates immediately upon break. Parrying skills are required.
• Maximum BP “Bu no Kyokuchi”: Super firepower with 8 hits on a single target. Prevent it by consuming BP in advance.

Template party organization (Lv60)

• Vanguard: Viator (evasion), Olberic (inheritance of damage upper limit), Hydne (debuff/steal).
• Rear guard: Merchant (Lucky Arrow firepower), Scholar (buff), Priest (total recovery).
• Equipment: Veteran series + recovery limit breakthrough accessories. Buffs physical defense with supporter.

tactics:

1. Opening: Stacks up and down defense.
2. Break: A simultaneous attack of sword, axe, fan, fire, and lightning will reduce your shield by 20 at once.
3. Mid-phase: Fill up the yellow gauge and use the normal secret technique repeatedly. I will definitely save it.
4. Before “Martial Pole”: Use BP reset skill.
5. After defeating: Insert the key into the pedestal and obtain the weapons one by one.

It takes 15-20 turns. In case of failure, we will coordinate with supporters.

5. Detailed performance of 8 legendary weapons and optimal job build: Specific example of party revolution

The weapons you obtain are focused on effectiveness that goes beyond battle history. Details below.

weapon name	physical attack	Attribute attack	special effects	optimal job
lightning sword	380	–	Physical defense 120, number of attacks +1	Swordsman (Continuous DPS)
Assault dagger	360	–	Critical hit +132, rare paralysis	Thief (critical paralysis)
Spear of wind and clouds	375	–	Speed ​​+99, rare physical power + (self)	Spearman (speed firepower)
sacred tree ax	300	350	All attribute power +	Axeman (all-purpose attribute)
moonlight bow	363	370	Rarely reduced speed	Archer (debuff firepower)
twilight fan	352	373	Rarely reduced elemental defense	Fan user (durability debuff)
book of the sun	186	400	SP consumption -25%	Wizard (fuel efficiency attribute)
wand of order	198	380	Recovers SP6 every turn	Support magic (permanent SP)

Build example:

• Firepower specialization: Can perform continuous vanguard attacks with Thunder Sword + Wind and Cloud Spear.
• Magic Pa: SP Infinite Secret Technique can be used repeatedly with the Book of the Sun + the Staff of Order.
• Balance: Attribute cover is possible with Spirit Tree Ax.

With this, it is possible to conquer the entire arena.

6. Utilization after clearing and mid-to-late development advice: Path to level 99

After obtaining a weapon, town build will be accelerated. Get over 2000 experience points/battle in the arena rematch and purchase imported items at the store. With the addition of Olberic, you can inherit the upper limit of damage, and with Hydne you can have unlimited materials. A smooth transition to the final chapter.

Training tips:

• We will strengthen our reserves by sending them to a training center.
• Maximize the torch by collecting blue stones.
• Temporary firepower is possible when used with forbidden weapons.

7. Commonly failed traps and QOL techniques: Final confirmation of stable clearing

• Overlooked key: Sotome Kojima Higashi is required.
• Boss weakness mistake: Multi-attribute formation.
• SP depleted: Immediately equip the Staff of Order.

8. Summary: Completely conquer the middle stage of Octora 0 with 8 types of sacred treasures

If you follow this guide, you will definitely get the 8 types of sacred treasures and strengthen your party to the fullest. The special effects of legendary weapons transform battles into something different, allowing you to reach the final level 99 content with ease. Set sail now for the Isle of Heroic Spirits. I sincerely hope that your adventures will be even brighter.