Has anyone completed this achievement? I can't figure out what to do. Wiki says to combine a bane+4 longsword with abyssal whip for the abyssalbane longsword. I can't make it work. I used the whip on the longsword and vice versa. I have tried tuning the weapon and tuning ores with the lunar spells but that doesn't work either. Any help would be appreciated so I can get this achievement ticked off.