If you want to know if someone is "real" tell them an obvious lie. A human will recognize it for what it is immediately, a cursed will not. They may look real, but they are not. Only real eyes realize real lies.
Phoenix Queen in Polish mythology, Oynyena Maria is the "Fiery Mary," a Fire Goddess who assists and counsels the Thunder God Piorun. This divinity also appears with southern slavs, and is usually considered to be the sister of the Thunder God/Saint.