$begingroup$ To compare your magic system with other magic systems, I tried recreating typical spells with it: $begingroup$ @Separatrix: All thermal engines Focus on the theory that one end is hotter. But, you see, the Stirling motor desires a hot supply and a chilly supply. $begingroup$ Stand with a boulder https://realmagicspellsbook91223.thezenweb.com/details-fiction-and-real-magic-spells-books-77753544