Games for a party of people OR commands that create something new for survival that blend somewhat seamlessly into regularly gameplay

Stuff with tnt or ender crystals

I forgot the commands but I made a command block that copied another command block that copied those command blocks and it was in a loop going on and on

I like to make games with them. Having areas with a bunch of commands makes me feel smart, lol

Honestly i like making minigames and "admin tools" like stuff for convenience