Battle Pass

The game's Battle Pass runs a period at a time, opened from Adventure Rank 20. Daily, weekly and period missions give its experience, a thousand a level for fifty levels, with a weekly cap on what the daily and weekly missions give. Its free tier, the Sojourner's Battle Pass, gives a reward plan's materials; its paid tier, the Gnostic Hymn, adds more.

Why deferred: its periods follow HoYoverse's live version schedule, and its period missions mostly ask for the events active in that period, which the world does not run (events). The community's dump keeps the periods' dates (BattlePassScheduleExcelConfigData) only for periods already announced, so a world replaying them would run out of periods, and its missions would point at events that are not there.

Revisit when: the world keeps events of its own, so a period's missions have something to ask for. Only the free tier is revisited then: the Gnostic Hymn is bought with money, and nothing in the world is (Genshin).

Sources

• Battle Pass, Genshin Impact Wiki: the unlock at rank 20, fifty levels of a thousand experience, the weekly cap, period missions around the active events, the Sojourner's tier and the paid Gnostic Hymn.
• AnimeGameData, the community's per-patch dump: the Battle Pass schedule with its periods' dates.