When the titular mythical creature in Rankin and Bass’s The Last Unicorn is transformed by magic into a human woman, her first reaction is despair. “I can feel this body dying all around me,” she sobs. It’s a gut punch of a line. The way she delivers it, it’s almost impossible not to start thinking about your own body rotting where you sit, the sag of your flesh as it inexorably loosens and thins, your bones as they grow brittle, your eyes as they cloud and fail. To the unicorn, untouched by time, the experience is as shocking and transformative as a child’s first brush with death.