A wight or thrall can look very different from any other wight/thrall. Some looking like living beings, others looking decayed, others looking like twisted abominations of their original form depending on the state of the body that is being reanimated and the skill of the necromancer. These undead beings are raised from corpses of heroes or soldiers and possess the same intelligence as they did in life. They have been cursed to follow any order their master demands, resisting is nigh impossible and will end in death of the thrall if they do manage to somehow resist an order.
Perception and Sensory Capabilities
Same as they possessed in life