There was a hotfix on December 19th making the Primal Illusions formulas dropped from Elemental Invasions tradeable on the AH. To this day, I have not seen any of these on any AH, even checking other realms than my own (Ravencrest).
It makes me think that this has not been implemented properly, as it will be dropping for people who aren’t enchanters, and they have nothing better to do than put it on AH.
And to top it all off, the Formula: Illusion: Primal Earth has been bugged since release, as it has never dropped from the appropriate rare.
Has anyone seen any of these on the AH? Or is my realm/searches just been particularly unlucky. Or better yet, if anyone has looted it since then, was it tradeable? I really need this recipe to level my enchanting 