Season 18 introduced the Illusion Knight — a mirror-image swordsman — and the Ignis Volcano, then changed gearing forever with the Artifact system. Season Pass tracks and cooperative boss events pushed MU further toward live-service rhythm.
Fighting alongside his own phantom duplicates, the Illusion Knight received two full item patches in his debut season, quickly becoming one of the most popular modern classes.
The volcanic hunting ground shipped with an elite zone, and Part 2 followed with Bloody Tarkan — a crimson rework of the classic desert wasteland.
Artifacts added a new equipment category with set-like bonuses collected and leveled separately from armor — an entire parallel gearing system that later seasons kept expanding.
A Season Pass reward track, an 'everyone together' boss event and the renewed Varka event map gave servers ready-made live events, alongside 6th mastery earrings and the 8th/9th gear rungs.