Diablo 4 Database: Storm Swell Aspect Codex
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How To Get The Storm Swell Aspect Codex
The Storm Swell Aspect Codex can be unlocked by completing the dungeon Onyx Hold Located in the region Dry Steppes.
How To Use The Storm Swell Aspect Codex
The Storm Swell Aspect Codex can be used by the Sorcerer class in Diablo 4. Once you have obtained this codex the first time, you will be able to apply it onto any of the available item slots whenever you’d like, as long as your are on a character of the Sorcerer class. Simply go to the Occultist in town to imprint the aspect onto the item.

When you are at the Occultist, select the item you want to imprint the codex onto, and under the “Codex of Power” section, choose Storm Swell Aspect. You will then have to pay a small gold fee and some materials
Important Note on Using Codex of Power
When using any codex to imprint a “Legendary Affix” onto an item, the effect quality is always the lowest possible number for that affix. However, if you recieve a legendary item as a drop, it may have a chance to roll a higher value than the Codex of Power version.
To see the possible ranges of values that can be found on the Storm Swell Aspect Codex take a look at the Legendary Affix “Storm Swell” to see the page dedicated to the legendary aspect itself.