A new zombie variant called "Burners" is introduced in The Walking Dead: Daryl Dixon, challenging the traditional rules of the undead. These zombies have acidic blood and skin that can burn on contact. The source of their power appears to be their blood, which penetrates the flesh and affects their skin. The episode hints at possible explanations for their creation, such as exposure to chemicals or being manmade. The presence of Burners suggests that there are multiple types of variants in the franchise, and their introduction changes the dynamics of the show permanently.