The Primordial Rune is one of those drops that instantly becomes a goal the moment you hear about it. Not because it’s easy to get—but because of how strong it is once you finally unlock it.
If you’re aiming for higher DPS and faster clears, this rune is absolutely worth the grind. But the game doesn’t hand it to you easily, and if you don’t understand the system, you can waste hours farming inefficiently.
Let’s break it down properly so you know exactly what to do.
Sailor Piece Primordial Rune Guide – How to Get It Fast
Primordial Rune is one of the secret runes added in the update, and its main focus is boosting your overall damage output.
This means:
- Faster boss kills
- Better farming efficiency
- Stronger overall builds
It’s not a utility rune—it’s a pure power upgrade. That’s why so many players prioritize it despite the grind.
Where to Get Primordial Rune
There is only one place where this rune can drop:
Infinite Tower (Tower Island)
This is the same mode used for Acheron farming, but here, you’re not farming currency—you’re chasing a rare drop.
Before you can even enter, you need:
- Tower Keys
How to Farm Tower Keys
Tower Keys are your entry ticket, so your farming speed depends heavily on how efficiently you get them.
The best way to farm keys is by killing higher-level NPCs, specifically on:
- Lawless Island
- Ninja Island
Stronger enemies tend to give better results over time, so don’t waste time on weaker mobs. Focus on areas where you can clear quickly but still get good drops.
Drop Rate
Here’s the honest truth:
The Primordial Rune has less than a 1% drop chance
That means:
- You will not get it quickly
- You will need multiple runs
- RNG plays a huge role
If you go in expecting a fast drop, you’ll get frustrated. This is a long-term grind.
How Infinite Tower Farming Works
Once you have your keys, you enter the Infinite Tower and start climbing floors.
As you progress:
- Enemies get stronger
- Bosses appear
- Difficulty increases
Somewhere during these runs, you have a chance for the rune to drop.
But here’s the important part:
The deeper you go, the more value each run has
This doesn’t guarantee the drop—but it increases your overall efficiency.