MU Online Season 15 — All Updates & Patch Notes
MU Online Season 15 introduced the Slayer as the game's 10th playable class, brought 3rd Mastery Earrings, and added two new hunting maps — Scorched Canyon and Crimson Icarus. The season delivered 4th Wings for all characters, a Dragon Knight Renewal, a Personal Store Renewal, and significant Skill Enhancement Tree improvements. Released across five parts from September 2019 to May 2020, Season 15 also introduced the Excellent Socket Necklace, the 2nd Guardian, and the Crimson Icarus Elite Zone.
What’s New in Season 15?
What is the Slayer class in Season 15?
The Slayer is MU Online's 10th playable character class, introduced in Season 15 Part 1-1. It is a dual-blade melee fighter with fast attack speed and aggressive close-range combat skills. The 4th Class Change and Skill Enhancement Tree were added in Part 1-2, exclusive 6th Mastery Armor in Part 2-2, and 4th Wings in Part 1-3 alongside all other classes.
What are the 3rd Mastery Earrings in Season 15?
The 3rd Mastery Earrings are the third tier of the Mastery Earring accessory system, introduced in Season 15 Part 2-1. They provide stronger stat bonuses than the 1st and 2nd tiers introduced in Seasons 13 and 14 respectively. Each subsequent season has added higher earring tiers, with Season 21 reaching the 9th tier.
What was the Dragon Knight Renewal in Season 15?
The Dragon Knight Renewal in Season 15 Part 2-2 was a comprehensive overhaul of the Dragon Knight class, updating its skill animations, damage formulas, and Skill Enhancement Tree to improve performance in both PvE farming and PvP. It brought the Dragon Knight in line with the newer class designs introduced in later seasons.