Webzen is holding the 'Mysterious Mastery' event in its PC MMORPG, MU Online.

The event runs from July 2 to July 23, and the probability of obtaining 'Luck' and three options on Mastery and Legendary grade weapons will increase by up to 4 times. The probability of obtaining bonus options, which increase various stats when existing equipment has the highest options, has also been increased by 2 times.

During the event period, 7-day limited-time Mastery grade weapons and armor are available for free. Users can use a 'Stone of Mystery' on these temporary weapons and armor to meet specific option conditions, allowing them to convert the equipment into permanent items to keep.

The 'July Egg-Hatching Monster' event is also underway. Users can hunt event monsters to obtain two types of 'Muun' for July. The acquired Muun provide additional abilities depending on their growth level, day of the week, and time of day.

In addition, Webzen plans to introduce various events every two weeks throughout July to celebrate the summer season. Detailed information about the events can be found on the official MU Online website.