The Star Wars universe is massive. There are enough shows, movies, books, games, and comics to fill a fan's waking hours for a decade. Most who enjoy Star Wars experience it on the same reasonable level. This can lead to sudden surprises when something from a novel or a tabletop game from 20 or 30 years ago pops into the movies or shows. Cortosis, a mysterious metal that can short out lightsabers, popped into The Acolyte, prompting a deeper look at the element's history.