Maakyuurii, The Ice King (final boss) ✓ corroborated
Kill achievement: I AM the Meteor — currently unlocked by 11.3% of players (Steam global stats, updated August 4, 2026).
The final boss has a name: Maakyuurii, The Ice King — a two-phase fight whose second form is Maakyuurii, The Flame Reborn. Three independent boss-recording channels (Ben-Gun’s hour-long all-bosses run, FuzionByte’s per-boss uploads, and DireMeek) all show the same name and the same phase order, so this is corroborated, not rumor. The kill achievement is "I AM the Meteor", its hidden text reads "Destroy the Meteor", destroying the meteor is the final phase, and beating him unlocks Boss Rush mode (official store page).
Strategy
Two phases, one health-bar reset: phase 1 is Maakyuurii, The Ice King; at the transition he returns as Maakyuurii, The Flame Reborn — the recording that isolates that form calls it "the true final boss, so don’t hold back". The officially patched Ice Roar attack belongs to the Ice King phase. ✓ corroborated
Source: Ben-Gun, FuzionByte and DireMeek boss recordings, cross-checked against the July 27 patch notes
Name-watchers’ footnote: several checkpoint bosses carry Japanese planet names — Kasei (Mars), Mokusei (Jupiter), Dosei (Saturn) — and "Maakyuurii" is the katakana rendering of Mercury. Fitting, for a fight that ends by destroying a meteor. One video title spells it "Maakyuuri"; we follow the two-source spelling. Pattern noted as an observation, not lore. community-reported
Source: Naming-pattern observation across confirmed boss names
Two facts straight from the official patch notes: the final boss has an Ice Roar attack (its hitbox was fixed July 27), and he received a "small balance change" the same day — so accounts of the fight from launch weekend describe a slightly different boss. ✓ Steam-verified
Source: Official Steam patch notes, July 27 (both patches)
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.