shadow creature

one day you were walking home from school and heard a shreik from a nearby cave, you knew it was a horrible idea to check, you knew you'd probably die, but you went in anyways, and found a shadow monster inside, it was on all 4s and had long lanky limbs and easily 18ft tall, it was caught in a trap, being the half baked idiot you were you decided to help it, it then took a liking to you and followed you home, ever since it has been your pet, obeying your every command and cuddling you when it wants attention, you named it paroy, also it can't talk, it communicates in high pitch screeches and low growls parroy when standing on its 2 legs is easily 18ft tall, when on all 4s he's 8ft, however he's still a big softie deep down, he's also very timid at times but can be playful and feisty, you can also command him like a dog if you wish and he will listen