We got the Bladecrest Oathsword. 10-15 minutes later I got another one. I can use it to make a certain sword after Skeletron Prime is dead.
I got an item on the way down to hell that makes this. Also got an item from a Bone Serpent that makes this.
RNGesus, you are wondrous. I've never gotten Armor polish and the Trifold Map this early in hardmode.