This mod will make creative mode more balanced. When you spawn in an item, it has the creativeSpawned nbt tag, and if the number of creativeSpawned Oak Logs (for example) is equal to the number of normal Oak Logs, you can't spawn any more, and you can't spawn any Diamonds (for example again) if you haven't already found 64 of them. You are no longer invulnerable, you just have 20 hearts (40 health) and 20 hunger. Block breaking speed is just cut in half from survival, and /gamemode c enables all of this. /gamemode b(uild(mode)) or /buildmode goes into old creative, and neither of these commands are in /help or the tab list. Peaceful mode only makes mobs act like endermen, only attacking if you look at them or attack them, prevents them from despawning, (when outside the radius when they would normally despawn, they just save the world file after 30 seconds, as long as another mob hasn't already queued a save) and also patches the force cheats exploit (open to LAN menu, turn on cheats there) by graying out the cheats button if cheats are off in the current world. Starting a world in creative disables all of this, and the mod is mostly useless if you start a world in creative.