Quote from Chockeh;693556:
If I remember correctly, they were suppose to take place in the same universe, but Nexon scrapped that idea and said that they took places in parallel universes or something (Not entirely sure). Though, there was alchemy before they decided to change the setting, so... maybe alchemy was a lost art?
Source? I want to stick with it until I can be 100% sure :T_T: (and many of my theories will go to waste if they dont). And also if it was lost it would make it very likely that Mabi takes place centuries after Vindi (although that´s what most people think anyway, none of Mabi´s books mention Vindictus etc.)