Frost Empress

Frost Empress is a Mythical sword in Sea 2 that arrived with the King Update of June 2026. The Fandom wiki lists two ways to get it. You can buy it from the shop for 599 Robux, or you can follow the quest line given by the Soul Reaper Trainer NPC on Frost Island: defeat 50 Sea 2 Quincies, collect 20 Soul Fragments and then beat the Frost Empress boss. The sword's F move starts locked. To open it the wiki asks for the Kuchiki clan, 10,000,000 gems, one Ice Core, 25 Soul Fragments and 10 Bankai Essence, and the mastery reward is the F move plus +300% damage, far above the usual mastery bonus. That number is the reason the wiki's trivia line says this sword does the most damage of any sword. Treat that as the wiki's claim, not something we measured: the ability section of the page still says it is to be added, so we cannot describe individual moves yet. In practice the route makes Frost Empress a late-game goal. Kuchiki is a clan roll, so the sword rewards players who already farm clan rerolls and Soul Fragments. Compare it with Sun God and Dual Wielder before spending gems, and re-check the requirements in game, because costs change between patches.