Season 16 to Season 18

From Season 16 onward Webzen split each season into parts and released several smaller patches inside every part. Summer updates usually brought a new or renewed character together with a fresh Speed Server, while the winter updates focused on new hunting grounds and gear. The table lists the Global releases described in Webzen press releases.

For the seasons before this period see Season 10 to Season 15, and for what came next see Season 19 to Season 21.

• Season 16 Part 1 (2021): the Gun Crusher arrived together with a new Speed Server, where players could level quickly to 700 and then move the character to an original server.
• Season 16 Part 2 (February 2022): the Magic Gladiator renewal let players pick a Knight type, using a two-hand or one-hand sword, or a Magician type with a staff and a shield for extra protection.
• Season 17 Part 1 (2022): the White Wizard: Kundun Mephis and Mage: Lemuria, doppelganger versions of Kundun and Lemuria from the game's story. At launch they could only be played on the Speed Server; a later event let players create them on original servers.
• Season 17 Part 2 (February 2023): the Elf renewal gave the attack type faster hits and stronger skills, and the support type new exclusive shields and buff skills.
• Season 18 Part 1 (2023): the Illusion Knight: Jacquard joined the Speed Server. He summons an Illusion Blade in his left hand and fights with different forms of Sword Energy; Dexterity raises his skill attack and attack.

Each Speed Server season had its own goal. In Season 17 Part 1 a character that reached level 700 earned +11 3rd wings and 100,000 Ruud plus a free transfer to its original server. In Season 18 Part 1 the goal moved to level 800, with +13 [Bound] 3rd wings and 350,000 Ruud.

Most new maps of this period are elemental fields. Their monsters drop Elemental Symbols (Fire, Water, Earth, Wind and Darkness) that the NPC Lahap combines into an Elemental Box, and some maps later opened an Elite Zone with stronger monsters and special drops. See the Elemental System for how the elements work.

• Gray Aida: a part of Aida drained of its colors by dark magic, home to elemental and elite monsters. Its symbols are combined into Superior Pentagrams and Mastery Parts.
• Old and Burning Kethotum: the lost, sealed city linked to Kundun and the sealed dark god.
• Kanturu Underground: a huge hidden space under Kanturu, found by Arca scholars while digging up ancient Kanturu relics. Its Elite Zone opened in February 2023.
• Ignis Volcano: monsters covered in magma from the depths of Vulcanus; its symbols include Fire and Darkness.
• Gore Tarkan: a land of blood-soaked sand with Gore Mutant, Gore Bloody Wolf, Gore Beam Knight and Gore Tantalose. They drop gear such as Excellent Apocalypse Armor and Excellent Socket Necklace, and MU Helper Plus can take you there.

• Jewel of Harmony renewal (Season 16 Part 1): the Jewel of Harmony now works on Excellent, socket and set weapons and armor instead of normal items, and items with a harmony option can be traded.
• Mount changes (Season 16 Part 2): mounts can now be ridden in towns and safe zones, attacking dismounts you automatically, and you mount again 3 seconds after you stop dealing damage.
• Mastery earrings: Earring of Blood (4th, Season 16 Part 2), Earrings of Allurement (5th, Season 17 Part 2) and Unity Earring (6th, Season 18 Part 2), which can be enhanced up to +15 with Lapidary Stones. See Mastery Items.
• Guardian Shining Tail (Season 17 Part 2): the 4th Guardian.
• Artifacts (Season 18 Part 1, third update): new Artifact equipment earned in the renewed Fortress of the Imperial Guardian: Baruka event, now open from level 1,000. Combining hexagon Artifact fragments gives rare options and up to +100 stats. The same update added the Group Boss Battle, where up to 40 characters hunt boss monsters together.
• Season Pass and Tempest Muun (Season 18 Part 2): the Season Pass runs for 28 days; daily missions give Pass EXP, and each Pass level unlocks reward buffs and items. The new Tempest Muun offers options such as Skillpower Increase or Attack/Wizardry/Curse Increase.

Every part of these seasons raised the Level Cap & Season Rewards by 50 levels. Characters that reached the target level before the next season received a gift box with a limited Muun.