What is Reddit's opinion ofAthletico Baseball Tote Bag - Tote Bag for Baseball, T-Ball & Softball Equipment & Gear for Kids, Youth, and Adults | Holds Bat, Helmet, Glove, & Shoes | Fence Hook (Black)?
Well, depending on the size of your sword you could try a baseball bat bag like this one, or a hockey stick bag like this one, this one, or this one. If needed you could duct tape a contoured cardboard sleeve for the sword so it doesn't poke a hole in the bag.
Good luck!
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Athletico Baseball Tote Bag...