Aero Core is a mythical-rarity material in Sailor Piece used for crafting and purchasing high-tier equipment. It drops exclusively from the Blessed Maiden boss, a summonable encounter on Boss Island. The drop rate is low, so efficient farming requires preparation and repeated attempts.
Quick answer: Defeat the Blessed Maiden boss on Boss Island. Each kill has approximately a 1% base drop chance for Aero Core, with higher difficulty settings increasing the rate. You need one Tempest Relic, 600,000 Money, and 600 Gems to summon the boss on Normal difficulty.
Requirements to Summon Blessed Maiden
The Blessed Maiden boss spawns only through the Boss Summoner NPC on Boss Island. You must pay a cost each time you summon, which scales with difficulty:
| Difficulty | Tempest Relic | Money | Gems | Aero Core Drop Rate |
|---|---|---|---|---|
| Normal | 1 | 600,000 | 600 | ~1.0% |
| Medium | 2 | 750,000 | 750 | ~1.2% |
| Hard | 3 | 850,000 | 850 | ~1.4% |
| Extreme | 4 | 1,250,000 | 1,250 | ~1.6% |
Tempest Relic is a legendary-rarity item that drops from any enemy in the game. High-level NPCs on later islands have better drop rates, so farming Shibuya Station or Hueco Mundo mobs is more efficient than clearing early zones.
How to Farm Tempest Relic Efficiently
Tempest Relic drops are rare but universal. Any NPC can drop it, so focus on areas with dense spawns and high enemy levels. Shibuya Station and Shinjuku offer fast respawn rates and clustered mob groups.
Using area-of-effect abilities speeds up farming. The Quake fruit's tsunami move can clear multiple spawn points simultaneously if you position yourself between two mob clusters. This doubles your kill rate and item chances per minute.
Equipping luck-boosting accessories and titles increases drop rates. The Blessed Sovereign title and Kitsune race both provide luck bonuses that apply to all item drops, including Tempest Relic.
Summoning and Defeating Blessed Maiden
Step 1: Travel to Boss Island using the teleport menu. The Boss Summoner NPC stands near the spawn point.
Step 2: Interact with the Boss Summoner and select Blessed Maiden from the boss list. Confirm your difficulty choice and pay the required materials.
Step 3: The boss spawns immediately. Blessed Maiden has 650,000,000 health on Normal difficulty, with scaling increases on higher settings.
Step 4: Use high-damage ultimate abilities to finish the fight quickly. The True Aizen sword's ultimate move and most Fruit V-abilities deal enough burst damage to shorten kill times significantly.
When Blessed Maiden is defeated, loot drops appear automatically in your inventory. Check the drop notification to see if Aero Core was awarded. If not, repeat the summoning process.
Blessed Maiden Drop Table
Aero Core is not the only reward from this boss. Other materials drop more frequently and are used for different crafting recipes:
| Item | Drop Rate (Normal) | Rarity |
|---|---|---|
| Tide Remnant | 16.41% | Epic |
| Gale Essence | 6.05% | Epic |
| Maiden Outfit | 1.64% | Epic |
| Aero Core | 1.47% | Mythical |
| Celestial Mark | 0.79% | Mythical |
| Celestial Outfit | 0.69% | Mythical |
Higher difficulties increase the drop rates for all items, with Extreme mode offering the best chances. However, the boss's health and damage also scale up, so balance your clear speed against the improved odds.
What Aero Core Is Used For
Aero Core is required to purchase the Blessed Maiden melee weapon from the Blessed Maiden NPC on Boss Island. This NPC stands on top of a rock past the boss spawn point.
The full crafting cost for the Blessed Maiden weapon includes:
- Astral Empress Title (0.8% drop from Blessed Maiden)
- 1× Celestial Mark (0.79% drop from Blessed Maiden)
- 3× Aero Core
- 8× Gale Essence
- 14× Tide Remnant
- 25× Tempest Relic
- 32,500 Gems
You will need to defeat Blessed Maiden many times to collect all required materials. Prioritize farming on higher difficulties once your damage output allows fast kills, as the improved drop rates reduce total runs needed.
Optimizing Your Farming Routine
Run Blessed Maiden on the highest difficulty you can clear efficiently. If Extreme mode takes too long, Medium or Hard difficulty still offer better Aero Core rates than Normal while keeping kill times manageable.
Stock up on Tempest Relics before starting a boss farming session. Farming 20–30 relics in advance lets you chain multiple boss attempts without interruption.
Use Gems and Money efficiently. Completing quests from Quest NPC 1 through Quest NPC 10 rewards Boss Keys, which can be traded for other materials at the Boss Token Exchange NPC. This helps offset the Gem and Money costs of repeated summons.
Track your drops after each kill. Aero Core has a mythical rarity tag in your inventory, making it easy to confirm when it drops. If you receive duplicate Tide Remnants or Gale Essence, those materials are also needed for the Blessed Maiden weapon, so save them.