I came up with this design for the Riptide sword from the Percy Jackson's saga by Rick Riordan, reading the books and looking on the internet for fanarts etc.
I really hope you like it and make it, and since I don't have really much experience in 3D modeling nor 3D printing, feel free to edit the original project in Fusion 360, and let me know! I'll be really curious to see it, if anyone would make it. Cheers :)