Old-School Magic
Old School Magic by Charles Rice is a 29 page supplement for the Old School Reference and Index Compilation (OSRIC) which, for those of you not familiar with the OSR, is an Advanced Dungeons & Dragons retroclone originally written by Matthew Finch. Old School Magic expands on the OSRIC magic system by presenting a breakdown of magic levels from low to high, new ways of implementing spells, new magical archetypes, and new spells.