The Zamorakian butcher demon is a powerful demon that has a 25% chance of spawning in place of a regular troop during the Battle of Lumbridge. There initially couldn't be more than one in the battle at any time, but due a glitch, multiple Zamorakian butcher demons occasionally spawned. Like all special units, they do not retaliate against players unless they are not currently under attack or are attacking any other target. They drop 3 times the amount of tears as the player's multiplier. After an update killing this demon does give combat experience.
During the voting, it is stated that Zamorakian butcher demons deal 200% more damage than normal units, have 200% more life points and have an AoE stun attack against other players. However, they actually have 750% more health (before the normal units have their health reduced upon being attacked by players), deal only comparable damage, and have not been observed to stun players.