Troubled by bothersome mold and mildew? There’s a god for that! Robigus is the Roman deity of rust and mildew. His honorary day is April 25. Implicit in the worship of deities who rule over things we find abhorrent is the recognition that these things do have a place — just not in our house, please. Pray to Robigus to keep rust off your ritual tools and mildew from you ritual spaces.