
The Ice Queen sword is one of the stronger weapons in Sailor Piece right now. It comes with solid damage and a useful skill set, especially if you’re building around Ice-based combat. Most players go for it in the mid to late game because of the grind involved.

You need to head to Boss Island first. This is where everything begins. Once you reach there, look for the Ice Queen NPC. She is tied directly to both the boss fight and the sword unlock.
Near that area, you’ll also find the Boss Summoner NPC. This is important because you won’t get any materials without spawning the Ice Queen boss.
To fight the Ice Queen boss, you need to summon her using materials. The main requirement here is Frost Relic, along with some gems and in-game currency.
Frost Relic is not guaranteed every time, so expect some grinding. You can get it as a rare drop from enemies, not just the boss, which helps a bit.
Once you have enough materials, talk to the Boss Summoner NPC and spawn the boss.

Most of your time will go into farming the Ice Queen boss. Here’s what you should focus on collecting:
You will also need a total of 40000 Gems.
Not every drop is guaranteed, so expect multiple runs. I found it faster to keep respawning the boss instead of switching areas. If you can handle higher difficulty fights, the drop chances feel better, but the fight gets harder.
You also need the Frost Empress Title, which only comes from the Ice Queen boss, so you cannot skip boss farming.
Once you have everything ready, go back to the Ice Queen NPC. You will need:
Give all the materials to the NPC, and you’ll unlock the Ice Queen sword.

After getting the sword, you can unlock its F move. This is optional but worth it if you plan to use the weapon long term.
You need:
Go to the Ice Queen Mastery NPC to unlock it. This also gives a damage boost, which makes a noticeable difference in fights.

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