Undo

Undo! is a mod similar to [https://modwiki.miraheze.org/wiki/Oops_Undo Oops! - Undo] that allows players to use a keybind and undo the last block the player placed. There is situations or a time span where you can't undo the block.

Video Review by Pravculear

This mod is Compatible with multiplayer!

I hate it when I am building and I can't undo stuff! Well, that will no longer happen! Press Z (Rebindable in keybinds) to get back the last block you placed!

No more explanations needed!

Well, maybe yes, the following actions will remove your ability to "undo" since otherwise you might dupe stuff and no one likes that!:

If the blocked is no longer in that position, you can't undo.

If you died, you can't undo.

If the block is a tile entity (Like shulker boxes) you can't undo.

That's it!