Is Runegraft of the angler missing or just a bait?

Hello,

I'm wondering if runecraft of the angler:
https://www.poewiki.net/wiki/Runegraft_of_the_Angler

Is a bait from the team or a real item to know if I can plan a build around it

(So far I did I see a single mention of it and there is no one to sell it)

Thanks in advance