From Scarlet Blade Wiki
A Capture the Flag style battlefield that occurs once a week on Saturdays. The battlefield can be entered through a portal that appears in your faction's corner of the Neutral Settlement in Viledon (The base of the portal is the activation point.)
Four flags and three turrets on each side of the map.
Boss in the center.
level 30 minimum to enter.
At the end of the 60-minute match, the faction with the most flags in their possession wins.