The Worst Experience I've Ever Experienced

"I've never seen this cat before in my life. We don't have a third cat, and there's no possible way another cat got inside as we're on the second floor with all entries to our home locked and sealed at night," she says. "It was like a seal, a rune, or insignia, not sure what the word I'm looking for that had a freaky looking lionish creature in the middle."