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Undead quilboars are quilboars turned into undead. Undead quilboars are even viler, worser, bloodthirstier and savager then living quilboar, because they possess the strength of the grave. They usually have rotting gray skin and they are allied with the Scourge. Most are found in the Quilboar's burial grounds, Razorfen Downs and may have first been risen from the dead by the lich .