Entia the Shifter is the main antagonist of the book series, Unicorns of Balinor. He is said to be the most evil being in Balinor, and is called the Shifter because he can transform into anything, though only for a limited time. The evil Shadow Unicorns, led by Moloch, serve him, as do the snake woman, Lady Kylie, and the Shadow Rider. The Night of the Shifter's Moon (the new moon) is the time at which his magic is at its strongest, and no good magic will work.