The Final Boss (name unconfirmed) unconfirmed

Kill achievement: I AM the Meteor — currently unlocked by 5.7% of players (Steam global stats, updated July 26, 2026).

The last story fight — and, remarkably, the one boss whose name no player has posted anywhere public yet. What is confirmed: the kill achievement is "I AM the Meteor", its hidden text reads "Destroy the Meteor", and destroying the meteor is the final phase of the fight. Beating him unlocks Boss Rush mode (official store page).

Strategy

The fight ends with a "destroy the meteor" phase — the achievement text itself gives that away. Details of the earlier phases are unreported; if you have finished the game, the boss's name and moveset are the most-wanted report on this site. community-reported

Source: u/choptup (100% completion) on the achievement text; the name remains unreported

Preparation that is safe to bank on: max a Soul Art line (the three MASTER achievements confirm full upgrade tracks exist), collect summons — Tank's heal-on-block is the community pick for fast fights — and expect the parry rhythm to be tested one last time. ✓ corroborated

Source: Steam achievement data + community summon consensus

Core mechanics that matter here

Deflect / parry — timed blocks that build the boss’s Resolve Bar. ✓ corroborated
Instinct Counter — the heavy counterattack available when the Resolve Bar is full after perfect parries. ✓ corroborated
Soul Arts & Boss SP — upgrades bought with SP earned from bosses; the Meteor Slice / Dash / Zone lines each have max-upgrade achievements. ✓ Steam-verified
Ghost Summons — defeated bosses can be unlocked as summons with passive perks. ✓ corroborated

Found something wrong, or beat this fight with a different setup? Send it in — corrections ship same-day and reports are credited.