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Some of those Ideation sketches look a lot like Kronis who leaked on the Jagex Flickr account last month.
Or at least, I can see some of the sketches concepts appearing in the final image.
Whatever that artwork is, it has nothing to do with the Tombs of Amascut.
Thanks for your hard work answering questions on this. Really hype for the updates!
Can you give us a hint if this NPC/Asset will appear in a future update?
Iām not aware of any plans for this character to ever be used in the game.