[Octopath Travelers 0]Immediately after obtaining the ship! A complete strategy guide to safely defeat the illusion of a great military master at a low level | Obtain 8 types of sacred treasures as quickly as possible to dramatically strengthen your party

In Octopath Travelers 0 (commonly known as Octora 0), we will thoroughly explain how to defeat the powerful sacred treasure boss “Illusion of the Great Master'', which you can challenge immediately after obtaining the ship. This boss is set at a high recommended level of 60, but if you use tactics centered on proper preparation and parrying, you can safely defeat it immediately after acquiring a ship in the low level 30s. The “8 types of sacred treasures'' obtained as rewards for defeating the enemy have top-class performance comparable to the veteran weapon series, and obtaining them early will greatly streamline story strategy, leveling, and boss battles.

This guide provides detailed information on how to access the Isle of Heroic Spirits, the routes to obtain all 8 types of Seal Crest Keys, recommended party formations, battle procedures, and countermeasures for dangerous actions. While we specialize in low-level strategies, we also include alternative strategies for high-level players, creating a content that can be used in any situation. Let's accelerate your adventure after acquiring the ship.

1. Detailed profile of the Great Master's Illusion, how to get to the Heroic Spirit Island, and quest occurrence conditions

The Illusion of the Great Master is a powerful phantom enemy that protects the sacred treasure that awaits you on the islet of Heroic Spirits located in the open sea area of ​​Octopath Travelers 0. This boss has a huge HP of 195,470 and a very strong shield point of 20. There are five types of weak points: sword, axe, fan, fire, and lightning, but the weak points may change due to the gimmick of switching weapons, and when a break occurs, a physical counterattack or an attribute counterattack will be activated immediately. Furthermore, when BP reaches its maximum, he will use a super firepower technique called “Bu no Kyokuchi'' that hits 8 times in a row, so it is necessary to thoroughly understand the movement pattern of physical attacks.

To access the Isle of Heroic Spirits, you must first clear the side quest “Queen Orsa” and obtain a ship. After obtaining the ship, set sail to the open sea from the port of Rippletide and proceed northeast. You will see an island a little further north of the island where you were washed ashore, so please land there. The enemy in the open sea is the ferocious Great Birdian II of the Rough Sea (weaknesses: axe, bow, book, lightning) that tends to appear, so use the ship's automatic battle to collect materials while navigating carefully. When you arrive at the island, examine the door of the central building (tower) to trigger the subquest “8 Sacred Treasures.” The condition for this quest to occur is that Viator has already joined your party. If you have not yet joined Viator, please show the Seal Key to the bard at the bar in Valore in the Woodland region and have him join.

Once inside the tower, examine the glowing green orb and move between the Sealed Weapons. An event will occur when you approach the weapon, and a battle with the illusion of a powerful martial artist will begin immediately after. After defeating them, you can unlock rewards by examining the sacred treasures on the pedestals, but each weapon requires the corresponding seal key. The next chapter will explain in detail all the locations where you can get the keys, but if you're aiming to conquer immediately after the ship, it's a good idea to at least secure the sword and dagger keys in advance. If you follow this route, you will be able to collect the sacred treasures from the beginning of the story.

2. Complete explanation of the performance of 8 types of sacred treasures and complete map and procedure for obtaining 8 types of seal keys

The eight types of sacred treasures are the strongest class of weapons in Octora 0, with high physical attack power and attribute attack power, and unique special effects. By arranging these items early, your party's firepower, durability, and SP management will instantly improve, making difficult bosses and leveling in the second half dramatically easier. The detailed performance of all eight types is summarized in a table below.

weapon name	physical attack power	Attribute attack power	special effects
lightning sword	+380	–	Physical defense +120, number of attacks +1
Assault dagger	+360	–	Critical rate +132, in rare cases paralysis applied
Spear of wind and clouds	+375	–	Speed ​​+99, rarely increases own physical power
sacred tree ax	+300	+350	All attribute attack power UP
wand of order	+198	+380	SP+6 recovery every turn
moonlight bow	+363	+370	Rarely target speed DOWN
book of the sun	+186	+400	SP consumption reduced by 25%
twilight fan	+352	+373	Rarely target attribute defense DOWN

The performance of these weapons exceeds that of the veteran series, especially the continuous attack effect of the Thunder Sword doubles physical DPS, and the SP reduction of the Book of the Sun strengthens the long-term battle resistance of magicians. The Bow Key can only be obtained after clearing Chapter 1 of Master of Power, so prioritize your collection.

Below is a complete list of where to obtain the 8 Seal Keys. Recommended levels and detailed instructions for each location are listed.

Type of key	Location details	Recommended level	Details on how to obtain
dagger	Serpent's Den (Flatland region, from North Cyatopolis Plain)	6	Examine the glowing ground to the left of the cave. Can be selected when creating a character.
sword	Valore (Woodland region)	4	Obtained automatically by joining Viator.
ax	Victor Hollow (Woodland region)	34	“Purchase'' to a fledgling antique dealer.
spear	A small island in the open sea – east – (Coastland region)	50	The glowing ground in the center of the island.
fan	Suhratarja (Sunland region)	39	“Begging” for explorers chasing mysteries.
cane	Grandport (Coastland region, street stalls)	39	“Begging” to a black market merchant in the port city.
book	Hotting Spring Cave (Highland region, from Belcane Mountain Pass)	45	Treasure chest on the right side of the cave.
bow	East Shiflo Riverbank (Riverland Region)	36	Treasure chest at the bottom left of the riverbank (after Power Chapter 1).

Prioritize collecting daggers, swords, and axes right after the ship, and collect the rest while the story progresses. The snake's lair can be accessed from the beginning, and enemies such as ferocious snakes will appear, but it can be cleared at about level 6. Now you can release all the sacred treasures and strengthen your party to the fullest.

3. The key to conquering a low-level ship immediately: Perfect setup of essential secrets, equipment, and BP circulation

The core of low-level strategies is the “parry” strategy, which nearly nullifies physical attacks. All of the attacks of the Great Master's Illusion are physical, so make the most of your parry tricks. First of all, please parry at least 3 slots of Viator and become masterful. Viator has many parries and can earn counterattack damage by using a flowing water stance. It is recommended that other characters also equip 1-2 slots.

Next, establish BP circulation. Make the main character a merchant job and make 3 BP trading secrets secret. Secure your first boost with the secret of BP supply for dancers (such as Saoirse). Equip all characters with Speed ​​Helm and Element Light Armor to stabilize pre-emptive action. Adjust your speed to 377 or higher to surpass the boss's order of action. Attach the recovery limit breaking accessory to the vanguard and raise the maximum HP to 4000 or more.

These preparations will be made immediately after acquiring the ship. After joining Viator, hunt for secrets in Valore and surrounding dungeons, and purchase equipment with Ember Glow etc. If BP circulation is stable and SP depletion is prevented, long-term battle resistance is excellent. If you are at a high level, add veteran equipment to strengthen your firepower.

4. Optimal solution for iron plate party formation and vanguard/rear guard placement

The optimal low-level organization is as follows. Specialize in parrying in the vanguard, and place firepower and support in the rear.

• Vanguard (parry wall role):

  Viator (Swordsman): Main counterattack with 3 parries and flowing water stance.
  Protagonist (merchant): BP trading secrets 3 slots, initial BP supply.

• Rearguard (firepower/support):

  Saoirse (Dancer): BP supply secret, damage by shooting backwards.
  Skia: SP recovery special move, support.
  Alexia: Removes HP at once with special move.

The first weapon has high attack power, and the secret to firing from behind is utilized. As a replacement, Olberik will be added to the vanguard to increase durability. If you are at a high level, use Hydne to stack debuffs. With this formation, you can reduce more than half of the boss's HP with counterattack damage alone. Concentrate parrying on the four frontline soldiers, while the rearguard continues attacking safely.

5. Step-by-step battle procedure: Highly reproducible route from opening to defeat

Immediately after the battle begins, he takes the lead by surpassing the boss's speed of 377.

1. Opening turn (all boost parries): Turn BP with BP trading and parry with everyone in boost state. Completely defeat the boss's first attack and reduce the shield by 1-2 with a counterattack.
2. Mid-game scraping phase (counterattack main force): Trigger the boss's full attack and accumulate damage with Viator's counterattack. When switching weapons, check the weak points and gradually reduce the shield 20 with sword, axe, fan, fire, and lightning. When breaking, be careful of the counter and immediately parry and recover.
3. Special move timing (HP 50% or less): With 8 or more parries remaining, Viatre's special attack and the main character Alexia's special attack will instantly reduce HP by 30%. BP reset seals the extremes of martial arts.
4. Destroy turn: After the shield is completely destroyed, finish with a series of boost secret attacks. Keep parrying around 8 times in every turn and aim for zero accidents. You can win 10-15 turns with this procedure.

6. SP/BP advanced management and “Bu no Kyokuchi” complete avoidance technique

SP depletion is the cause of defeat. When Viator SP runs out, switch to parrying from other characters and fully recover with Skia's special attack. BP circulates infinitely in merchant transactions. If there is a shortage of supply, we will add Odoriko Gokui. Martial Kyokuchi (8 hits per unit at max BP) can be stopped with advance BP consumption skills. Or you can withstand it with high object defense buff + debuff. During long wars, don't forget to replenish your HP/SP with cooking.

7. Alternative strategies and troubleshooting tips for advanced levels

If you are level 50 or above, you can defeat it in 5 turns by stacking physical defense buffs and focusing on attribute breaks. Include scholars and priests in your party to maximize buffs and debuffs. In case of an accident, use save road. We will carry out evasive priority navigation as a countermeasure against foreign enemies.

8. Summary: Get the Sacred Treasure right after the ship to clear the Octra 0 adventure as quickly as possible

Defeating the Great Master's Phantom is a turning point immediately after acquiring the ship. Use this parrying strategy to win safely at low levels and collect 8 types of sacred treasures. By strengthening your party, all stories and side quests will become easier, and you won't be afraid of the truly powerful enemies at the end. Head to the Isle of Heroic Spirits now and obtain the power of the Sacred Treasure. Your adventure will shine even more.