You need to find three Obsidian Fragments of the same colour to get an Obsidian Ring in Genshin Impact. For example, you need to find three Yellow Obsidian Fragments to get the Yellow Obsidian ...

The Sunset-Blue Obsidian Ring is a new item introduced in Genshin Impact 5.5. Like other Obsidian Rings added in previous versions, it can also be used to unlock a secret tribal space in Natlan ...

The Obsidian Lamina is a Reaper introduced in the Shadow of the Erdtree DLC for Elden Ring. This is the only Reaper added in the expansion. Signature weapon of the Pureblood Knight Ansbach.