In this guide, we will break down the ways to get Primordial Rune, farm Tower Keys, the best builds for clearing the Infinite Tower, and the RNG mechanics for a faster grind. So, let’s begin!
What is Primordial Rune in Sailor Piece?
Sailor Piece has officially introduced the Infinite Tower on Tower Island in the newest version. With that comes Primordial Rune. It is a rare drop obtained from farming higher levels of the Infinity Tower, occupies a unique slot in your inventory. Unlike swords or fruits, This new accessory offers up to 168% damage boost depending on your current Ascension level, it functions as a permanent multiplier to the damage your character does. It gives a base damage multiplier of 112% at Tier 1 that increases up to 168% when fully ascended.
Not only that, it stacks multiplicatively with the Abyssal Empress Sword and the Shadow Fruit. If you are doing Boss Rush or trying to hit the top of the Global Damage Leaderboard, you need Primordial Rune at all costs.
However, getting this rune is not a child’s play. It is a rare item with a very low drop rate. The only way is to farm the Infinity Tower. You can check out the Sailor Piece shop to get you the items to help you in this journey.
How To Get Primordial Rune Fast Step-by-step Guide
Step 1: Get The Tower Key
To enter the Infinity Tower, you need Tower Keys. The drop rates of these keys are tied to the level and density of the mobs. Here are some of the high probability locations where you can farm for the Tower Keys:
- Lawless Island: The mobs here are level 5,000+ and spawn in tight clusters. Using an AoE-heavy fruit like Madara or Yamato you can clear the entire island in seconds.
- Ninja Island: This is an alternative option for mid-game players. The drop rate is slightly lower (roughly 0.5% per kill), but the mobs are easier to one-shot if your MAG stats are not maxed out yet.
Step 2: Farming the Infinite Tower
Once you have enough keys, head to Tower Island and speak to the Infinite Tower NPC. The Infinite Tower gets progressively harder with every five floors.
- Floors 1-20: These floors mostly have standard mobs from the starter islands. If you have any endgame sword like the True Aizen, you should be able to M1-spam through these.
- Floors 21-40: Here you will encounter elite mobs with significantly higher difficulty. Madara with the Abyssal Empress Sword can clear these floors easily.
- Floors 41-60: These floors have boss variants. This is where the Primordial Rune begins its drop table. While it may drop as early as floor 1, the weight of the drop increases significantly every 10 floors after floor 40.
Step 3: Best Builds For Higher Floors
If you want to clear the tower fast, your build needs to focus on AoE Damage and Stun Resistance. Here are two recommended builds that can help you get through the higher floors. You can get the required Sailor Piece items for making the perfect builds.
1. Madara + Abyssal Empress Sword
This is currently the most popular build for Infinite Tower. Madara is perfect for wide-range fire attacks and the bleed damage of the Abyssal Empress Sword can melt the floor 50 bosses easily. For HP and MAG boost, you can use traits like Eminence or Espada. Use your wide-range fire moves to clear the initial 20 waves instantly. Once you hit the boss floors, switch to the Abyssal Empress and use the Shadow Slash to keep the enemies at bay.
2. Shadow + True Aizen Sword
If you have high MAG stats, the Shadow Fruit’s "Atomic" move is the fastest way to clear floors. Paired with True Aizen you gain high speed, and an easier way to build Haki. For Accessories, any item that boosts Luck is good.
Comparing the Radiant Rune vs. Primordial Rune
A common question in the Sailor Piece community is: "Should I go for the Radiant Rune first?"
To simply put it, Radiant Rune gives a +39% increased Luck. This is great for farming. It makes getting other accessories, like the Abyssal Outfit, much easier. On the other hand, the Primordial Rune gives you a +168% Damage boost. This makes Boss Rush and the Shadow Empress fight easier.
What you can do is farm the Radiant Rune first. It also drops from the Infinite Tower. Once you have the Radiant Rune equipped, your chances of getting Primordial Rune are slightly improved due to the Luck stat.
Some Advanced Tips
- Each Ascension level increases the efficiency of your equipped runes. A Primordial Rune on a non-ascended character is only 60% as strong as one on a Max Ascension character.
- Your Haki color actually provides a minor stat boost. If you are struggling with the higher floor bosses, try rerolling for the Crimson Haki that boosts damage or Azure Haki that boosts defense.
- The secret RNG table for the Primordial Rune has a built-in Pity Weighting that resets if you leave Tower Island for too long. For maximum efficiency, farm at least 25 to 50 Tower Keys at Lawless Island before heading to the tower. This allows you to do Batch Runs, which statistically improves your chances of hitting the drop table within a single session. You can check the number of Tower Keys you have in the Sailor Piece items tab in your inventory.
- The Primordial Rune is classified as a secret drop, as it does not show up in the standard loot preview. It is a 0.1% to 0.8% drop chance depending on how high you climb. Therefore, it is always recommended to go deeper in the tower levels for an increased chance.
Also read: how to get all hakis in sailor piece
Conclusion
To get the Primordial Rune fast in Sailor Piece, you need to first farm Tower keys in bulk at Lawless Island. Then enter the Infinite Tower with a good build like Madara or Shadow, and push past floor 60 where the drop rate actually increases. The 168% damage boost is the key to unlocking the true endgame of Sailor Piece. If you have Primordial Runes, you are unstoppable!
