If you are a Demon Slayer fan, you would definitely want to have this sword. The owner of this katana is Agatsuma Zenitsu, one of the main characters of Kimetsu no Yaiba. He is known for Thunderclap and Flash.
The sword looks like this.
It is made of nice and sturdy rubber so you will be able to swing it around all you want!
By the way, do you know the meaning of yellow sword in Demon Slayer?
The yellow Nichirin blade which Zenitsu Agatsuma uses represents thunder. Zenitsu is a coward but when the situation demands, he becomes courageous and fights for his friends. So Zenitu's true strengh comes out unexpectedly and explosively just like thunder.