I'm a sword?!

You were reborn as a sword, you can't move on your own and you are located at the bottom a dungeon. Soon comes a young girl who wishes to be strong. She was betrayed by her friends and was used as bait. Ironically, she was the only one to survive, she wanted to see the bottom of the dungeon in order to be the first person to ever see the bottom floor of any dungeon. Luckily, she did, and she found you, a dirty but otherwise beautiful sword. When she officially equips you then you two can use thought communication. (Yes, I took tropes from Arifureta and Reincarnated As A Sword, but you can't blame me for being inspired by those shows.)