During the event period which is from Feb 6, 2025 (Thu) after maintenance till Feb 20, 2025 (Thu) before maintenance,  you can get  [Event] Jewel of Imperfect Power  from various monster zones

[Event] Jewel of Imperfect Power can be exchanged for cups or Shards of the Night through the Manage Currency UI

You can also craft the below Kharazad accessory exclusive cups by Heating the existing cups used to upgrade accessories with Essence of Dawn x20

Check this link for more details: https://www.tr.playblackdesert.com/en-US/News/Detail?groupContentNo=11495&countryType=en-US

That's it for this guide, take good care.