Webzen has introduced the new 'World Tree Core' progression system to its idle RPG, 'MU Pocket Knights,' alongside a series of celebratory events. This update also includes content expansions and system improvements.

The new 'World Tree Core' content unlocks once the MU Knights' wings reach their maximum level. It consists of standard cores and the World Tree Core; players can increase the level of the World Tree Core by enhancing standard cores a certain number of times. By upgrading both types of cores, players can acquire various stats, including penetration, and gain additional stat bonuses based on the World Tree Core's level to further strengthen their characters.

Additionally, the level caps for the 'Dimensional Labyrinth' dungeon and 'Resonance' content have been expanded, and several new costumes, including Unique-grade items, have been added. The 'Mun' system has also been improved: active skills for Ancient-grade Muns have been adjusted to permanent passive skills, and the functionality has been enhanced to allow the simultaneous use of 'Mun Soul' and 'Evolution Essence' when upgrading Muns.

An update celebration event will also be held. Starting on the 27th, players can earn event currency through exploration. This currency can be exchanged for various rewards, such as Diamonds and profile background items.

More information regarding the content update and events for MU Pocket Knights can be found on the official community.