Dire orc

Dire orcs are apparently heavily mutated orcs.

Background
Dire orcs are created through Bleeding Hollow clan rituals, though Twilight's Hammer would seem to know how to create them as well; it is unclear if the Twilight's Hammer has their own methods or have adopted the Bleeding Hollow's.

The first dire orc was seen in the Black Temple. Gurtogg Bloodboil, a member of Bonechewer clan and leader of the local fel orcs. After the Cataclysm, Raz Skullcrusher was captured by the Twilight's Hammer clan and empowered into a dire orc by magic energies. Later, a group known as the Dark Shaman tried to recreate the Twilight ascension process. The experiment resulted in a dire orc: Lava Guard Gordoth.

Appearance
Dire orcs are monstrous, mutated orcs. Due to the wide variety of orc clans and skin colors, their appearances are drastic. Their skin colors include green, yellow-green, red (fel), gray, gray-purple and pale gray/white.

Trivia

 * Dire pale orcs and Blackrock orcs appear on Old Draenor as part of the Iron Horde.