Explore the innovative Magic Castle open-source software that replicates the HPC infrastructure experience using cloud resources in this 58-minute talk by the Chair of SIGHPC Education. Learn about the architecture and general functioning of Magic Castle, which can be deployed in minutes to provide users with a complete HPC cluster software environment. Discover how this tool, featuring a scheduler, data-transfer node, JupyterHub, and thousands of expert-compiled software applications accessible via CVMFS, has been utilized for thousands of workshops and tutorials worldwide since its 2018 release. Gain insights into educational use cases and real-world applications of Magic Castle in teaching High-Performance Computing.