Tarkatan

The Tarkatans are an interracial breed of warriors, a mix of humans from Outworld and Demons from the Netherrealm. Later material, particularly in Mortal Kombat X, suggest them to be their own breed however.

Features
They have long pointy teeth, large mouths, and blades protruding from their bodies, especially their arms. Baraka is their leader, and it's revealed Mileena is half-Tarkatan as well. The Tarkatans are a nomadic species, mainly populating Outworld's wastelands, but it's discovered that they come from the Netherrealm and migrated to Outworld. This race possesses a love for battle and serves whomever is in command (Shao Kahn, the Deadly Alliance, etc.).

Trivia

 * There exist a Tarkatan Xenomorph, an alien born from one of their number.