A group of goblinoids.

GOAL
Hoard artifacts from the Empire and use those to destroy civilization.

HEADQUARTERS
Madragor

However, they have recently uncovered a gateway in the ruins at the base of the Spire and have begun infiltrating the city.

LEADERSHIP
Matriarch

The Horde was not inspired by World of Warcraft. I thought of it way before Blizzard. Waaaaaay before.