I did everything I can think of to phase Nordrassil from BFA to Cata. I spoke to Zidormi at Darkshore flew all the way back and Magni is still there with Azerite mobs.
Has anyone has any luck in getting it. I am trying to collect the plans at the end of the Molten Front vendor.
You need to do alot of things, It will take a month.
You need to clear the story line in Mount Hyjal up to a certain point with the Turtle dude then you can unlock the zone.
You will need to do dailies to get a currency to expand it, then keep doing them for more to expand it, and eventually unlock the NPC that sells the recipe’s.
Oh and insult to injury it is not account wide so you need to do it all over again on any other characters you want the recipe’s for.
I know that but how do to convert the time back to Cata time?
I wanted to unlock it but my gawd that sounds tiresome.
Maybe check the chamber of the heart to see if the quest is in there and finish it?
Once you do the main story the molten front is by the statue of malorne starting with an NPC there.
Not quite sure what you mean by this.
Have you completed the Mount Hyjl quest line? (Unless something has changed, the whole Moltan Front quest area only appears after the zone story arc is completed)
I just wana say I miss that zone. 
It was the best daily quest hub.
It’s great… or would be if all the vendors and the zone itself was an account wide unlock.
Otherwise imo it’s the worst daily zone ever.
There aint no “converting back”. If you have angry azurite filled critters running about, you can finish the questline with HoA. This should not affect the Molten Front. You have to just spend the time (weeks) opening the Molten Front in Hyjal and recruiting all the forces.
It’s called “A Fresh Trauma”. The questgiver is an earthen at the entrance to the Great Seal. This is one of a number of BfA quests that will phase you out of normal zones if you are eligible for the quest, even if you haven’t taken it.
It’s completely stupid that if you arrive there and see Magni, you can’t grab the quest from him right then and there.
Yeah that was the issue. Blizz needs to do a better job of phasing. Thanks buddy.