Leagues have various skills, and as the league level increases, you can unlock more skills. Upgrading the league grants league skill points. R4 and R5 members can upgrade corresponding skills based on the needs of league members, and higher skill levels provide greater buffs. Activating skills will consume league points, and during the skill activation period, all league members will enjoy the buffs of the activated skills. R4 and R5 members can reset allocated league skill points according to the league's needs, but you cannot reset skill points if any league skills are already activated. Additionally, there is a cooldown period after resetting skill points, and you need to wait for a certain amount of time before you can reset skill points again.