THIS IS A SUPER BASIC WORLDEDIT PLUGIN FOR 1.21.4 (As of this moment WorldEdit has not been updated and we needed a temp. world editing plugin so I quickly tossed this on together, will probably keep this updated anytime WorldEdit breaks on an update as this one is so bare bones its quick and easy to update just a heavily stripped down version to get by with.

NATUARALIZATION AND NATUALIZATIONS HAS NOT BEEN TESTED I CAN NOT CONFIRM IF THE THE /UNDO COMMAND WORKS CORRECTLY YET.

Discord is officially here!: https://discord.gg/yXCDNmKwYZ

Command Description Usage / Example
/wand Gives the selection wand tool. /wand
/fill Fills a region with a specified block, only replacing air blocks. /fill <blockType>
/fillr Fills a region with a specified block, replacing all existing blocks. /fillr <blockType>
/set Fills a region with a specified block, replacing all existing blocks. /set <blockType>
/replace Replaces one block type with another in the selected region. /replace <fromBlockType> <toBlockType>
/copy Copies the selected region relative to the player's current position. /copy
/paste Pastes the copied region relative to the player's current position. /paste
/rotate Rotates the copied region by a specified angle. `/rotate <90
/flip Flips the copied region along the specified axis. `/flip <x
/undo Undoes the last operation performed. /undo
/redo Redoes the last undone operation. /redo
/ brush Sets up a brush tool to modify terrain interactively. /brush <blockType> <radius>
/naturalize Makes the selected region look natural with grass and dirt layers. /naturalize
/cut Cuts the selected region and saves it to the clipboard. /cut
/ getbrush Retrieves a brush tool for terrain editing. /getbrush
/snowcap Applies snow to the top of blocks in the selected region. /snowcap
/getsnowcap Gives the player a Snowcap Wand. /getsnowcap
/pos1 Sets the first position for region selection. /pos1
/pos2 Sets the second position for region selection. /pos2
/up Places a block directly under the player and raises them up. /up <height>

Permissions:
customworldedit.use Allows usage of basic CustomWorldEdit commands. op
customworldedit.wand Allows access to the /wand command. op
customworldedit.fill Allows access to the /fill command. op
customworldedit.fillr Allows access to the /fillr command. op
customworldedit.set Allows access to the /set command. op
customworldedit. replace Allows access to the /replace command. op
customworldedit.copy Allows access to the /copy command. op
customworldedit.paste Allows access to the /paste command. op
customworldedit.rotate Allows access to the /rotate command. op
customworldedit.flip Allows access to the /flip command. op
customworldedit.undo Allows access to the /undo command. op
customworldedit.redo Allows access to the /redo command. op
customworldedit.brush Allows access to the /brush command. op
customworldedit.naturalize Allows access to the /naturalize command. op
customworldedit.shape Allows access to the /shape command. op
customworldedit.cut Allows access to the /cut command. op
customworldedit.getbrush Allows access to the /getbrush command. op
customworldedit.snowcap Allows access to the /snowcap command. op
customworldedit.getsnowcap Allows access to the /getsnowcap command. op
customworldedit.pos1 Permission to use /pos1 command. op
customworldedit.pos2 Permission to use /pos2 command. op
customworldedit.up Allows access to the /up command. op