Anyone know why Abyss won't run even tho its in my mabinogi steam folder?
Make sure you have the proper ijl.dll and .dat files. Sometimes when Mabinogi updates, it replaces those files with NX's files.
You can download them on page 1 or from Blade's website.
Edit:
I also just remembered that your client through the Steam folder is going to have a different path.
For normal NX Launcher users: C:/Nexon/Library/Mabinogi/appdata
For Steam users: C:/Program Files (x86)/Steam/steamapps/common/Mabinogi
Make sure your files are in the last folder destination as well for the client to read them.