In the common vernacular, prunella vulgaris sounds like it must be some sort of panacea. Widely known as self-heal or heal-all, among other things, this plant won’t quite cure everything for you, but it may come close. I enjoy learning the common names of plants: it really gives insight into what past generations may have used it for, and as the name suggests, self-heal was used for a variety of ailments, from sore throats to scrapes.
Although it’s mostly fallen out of use in modern times, it’s worthwhile to bring it back into use, and as long as you don’t live in the desert, there’s a good chance that it’s already growing nearby.