cerberus: (Greek mythology) the three-headed dog guarding the entrance to Hades; son of Typhon
mythical monster: a monster renowned in folklore and myth
rain stick: a percussion instrument that is made from a dried cactus branch that is hollowed out and filled with small pebbles and capped at both ends; makes the sound of falling rain when tilted; origin was in Chile where tribesmen used it in ceremonies to bring rain