Lost Riches has returned to Genshin Impact, and this time, the treasure hunting quest is set in Inazuma. For those who are unaware of the Lost Riches event, originally players had to find Ulman in Liyue to kickstart the quest to find iron coins buried throughout Teyvat.
This time, however, you need to be at least Adventure Rank 30 and to have completed 'Ritou Escape Plan' in the Archon Chapter 2 Act 1 questline to start the Lost Riches event. You can then use the treasure-seeking seelie to unearth iron coins and hidden special treasure.
The event runs from August 6 to August 16, and each day two new treasure areas unlock in which you can use the treasure-seeking seelie. The helpful little creature guides you to the treasure by shining brightly and making a rapid beeping noise the closer you get. You can exchange the iron coins you find for rewards such as primogems, hero's wit, and mini seelies – note that you can only obtain one mini seelie from this event, so choose carefully. There's also extra buried special treasure hidden on the map: here's where to find them.