Ventoy
Ventoy is a free and open source tool to create drives that allow you to select and boot any EFI, IMG, ISO, VHD(x), or WIM files stored on a rewriteable partition on the drive.
Installation
Install ventoy-binAUR.
Setup
Warning: The drive used will be erased and all its existing data will be lost after setup.
There are three utilities for setting up the media:
- 
/opt/ventoy/Ventoy2Disk.sh, which is a shell script to be run from the command line.
- 
/opt/ventoy/VentoyGUI.x86_64, which is a graphical application.xauthor a similar application is needed to escalate to root if the application is not started with root permissions.
- Opening file:///opt/ventoy/WebUI/index.htmlwith a web browser.
The same utilities can be used for upgrading the Ventoy installation on the drive.
Usage
Ventoy creates two partitions on the drive: one to store the bootable images and another for the Ventoy binaries.
To add images from which you can boot, mount the first partition and copy the images over.