A weapon that you can swing around and stuff.
To use it, first give yourself the "balluser" tag (/tag @s add balluser) and reload the datapack to spawn the flail.
Use a warped fungus on a stick to control the ball. It will fly towards the block that's 5 blocks away from you in the direction you're looking. The further it is from the block, the faster it will go.

It deals damage to any mob that it comes in contact with.