Building a character up in Wuthering Waves requires farming for powerful echoes, XP materials, Ascension materials, skill level-up materials, and a lot more. Almost everything related to this process ends with players earning Union XP. The gameplay loop is meant to naturally increase the world level as players increase their character levels. However, players can easily end up in a situation where, despite earning a lot of Union XP and increasing their world rank, their characters lack the necessary DPS to take down even regular enemies in a reasonable amount of time.