The Server Killer

Basically this datapack, when used, will kill the server. It won't harm it, mind you. It will just force it to crash and roll it back to the last save. The only real functionality I see this pack having is if you want an un-opped individual to be able to shut down the server. Besides that it is solely fun. The datapack either places a commandblock and activates it instantly where you're standing, or it gives you a command block. These command blocks contain the command to summon thousands of TNT minecarts that are passengers of each other. Don't worry; they can't blow up. The command is bordering the 65,000 character limit, so activating it will cause an instantaneous server crash. If you try to open the command block and read it's contents(in multiplayer; doesn't work in single player), it will kick you from the server instantly because the max packet size only allows for about a 32,500 character string.The just lag function will summon a much smaller payload of tnt minecarts from a repeating command block. If you stand near the command block upon activation you get yeeted into space. The block isn't always active. It uses a redstone block which is blown up instantly, so it doesn't stay on forever.

Commands:
/function serverkiller:instakiller
/function serverkiller:cmdblock
/function serverkiller:justlag
(NOTE: The last command will cause a massive explosion that will cause TNT damage.)

Enjoy.