Guessing this was a mistake but wanted to make sure you knew. Thanks!
AllTheMods/ATM-5#171

I thought it was mistake, but the original mod developer set that number. There is a config option to either turn it off amd/or change the damage value. Which is insanely high. I may look in reducing it for its default damage. but you should be able to change the damage.

So the issue is closed...? If so I gotta make the new recipe insane to balance it.

I finally figured out what had happen. Apparently this was an issue as far back as 1.12. The Configs said it was for durability but was linked up to dmg. Since I was just porting stuff over, I didin't noticed that. there was a switch. I kept looking at the code.. and was like no.. this is from the original mod. But the configs had a different wording than what the code showed. so I be changing the configs up to have a change.

Edit: TBH Im not sure what was truly intended from the original developer. So I will just have to come up with some new numbers. I was only leaving the original numbers as I'm trying to not change too much of what was his mod. But I will be honest as that number looks more like a durability number instead of a damage number. I do know this was suppose to be the strongest weapon, but it wasn't meant for all packs. Also didn't realize the recipe was so easy. So.. I have no idea what the initial idea was for this.. other than it was some sort of streamer item.

If you were going to keep it I would recommend just adding a config to remove the item. I added an insane recipe for now but if you do any changes let me know and I can balance to your changes.

Removed kappa in version 4.0.5.. The item exist but no recipe for it. the configs dont work like they use to in minecraft forge 1.12 so the configs didnt' work at all. they were just removed for the time being.