So i came across this bug/exploit with Conjure Refreshment!
i was questing with my mage level 78 and was baking me some Conjured mana pie when we suddenly got the archievement Set the oven to "Cataclysmic"
so i tried to conjure more of them and it counts towards the next archievement called "Time to open a Restaurant". so if you have a mage in level 74-79, start conjuring for easy guild archievements!