THIS ACHIEVEMENT HAS BEEN PATCHED ONLY FOR NEW PLAYERS ENTIRELY MEANING IF YOU HAVE ALREADY MADE A CHARACTER AND UPGRADED IT BEFORE THE PATCH THE ACHIEVEMENT IS UNOBTAINABLE EVEN IF YOU MAKE A NEW CHARACTER AND UPGRADE THEIRS
--->Apparently making a new character wont fix this so if you have already started the game you are screwed and this is still UNOBTAINABLE however if you are new and have just started you should be able to get it
8/30/2019 EDIT: It seems that they have fixed this achievement and the scrap achievements for the most part but seems others are still having issues, Mine as well as others got it to pop just by signing into out players.
To get this achievement you need to acquire an item called a simulacrum that are randomly across your world on the floor as all worlds are randomly generated. However in your first play through you should find around 3 or 4 of them if your looking around good enough.
You also need 10 lumenite crystals which are obtained by killing any big enemy who has a bigger health bar, they should drop pretty often but not always.
Once you have 1 simulacrum and 10 lumenite crystals, return to ward 13. You need to give the materials too the tree lady you must save in the campaign who will now look like a hunchback she is located in the same room south of reggie the guy who gave you the dragon heart. now just talk to her a few times and she will upgrade your dragon heart.