Explanation as if it was a Pokedex entry Shadow, the Ghost Cat. It has sharp claws hidden below it's silky and delicate fluff. When it's body starts glowing, it senses danger. If every glowable part is glowing (as seen in the picture above), then you mustn't approach it. That means it is readying an attack. Instead, you must back away, not to turn your back until it is out of eyesight. It can teleport from tree to tree, and can turn invisible, leaving behind only a couple purple and black particles to and from where it teleported, only for them to dissapear after a second or two. It has teeth that could slice a diamond in fours in seconds. When it is already angered although you have not approached it, run away as fast as possible before it sees you. If it sees you, you cannot run away until it decided whether you should live or die.