Scrum is an undead warrior who recently awakened in Deathknell. He had slumbered for several years in a magical sleep, a result of his exposure to the fallout from a magical battle in the Skittering Dark during the rebellion of The Dark Hand Covenant.
In life, Scrum was a soldier in the Stormwind army serving under Captain Mauron Alnamis. At the end of the Second War, he followed Mauron and his unit into Draenor as part of the campaign against the Horde. When they returned to Azeroth, Mauron was taken over by the soul of the Orc Warlock Al'ghul and emanated a tainted aura that corrupted his most trusted followers, including Scrum. They became The Blackheart Templar, the core generals of The Dark Hand Covenant.