CTRL+Z would be useful i think

Context
I am creating my own mini game server for Minecraft withe Minestom,
a java library to create your own server for Minecraft from scratch.

I managed to get the build tool to a moderate level of usability.

You can now:

• select an area
  • over wooden axe
  • over pos1 and pos2 command
• fill selected area
• setblock at specific position
• replace blocks in selected area
• undo & redo actions you did
• give yourself an item you need and don’t find in creative menu like a
  light block or a command block or something

I also made the world where you can edit maps calculate light in the
world.

Thanks to that i managed to fix some light issues i had previously with
my lobby map. Now i don’t have to give all player night vision the
entire time.