A White Walker is a tall, humanoid creature with pale, icy-blue skin, glowing blue eyes, and a skeletal, frost-covered appearance. They wear ancient armor and wield weapons made of ice that can shatter regular steel. Created by magic, they command the undead and bring extreme cold wherever they go. Silent and menacing, they are nearly invulnerable but can be destroyed by dragonglass or Valyrian steel., Game of Thrones