Khadi

A Khadi is an undead minion, made so by a gaijin ritual that removes the victim's heart and link him to his master's. A khadi will exist as long as his heart remains intact, so gaijin sorcerers keep the hearts of their minions hidden to retain control over them.

The word Khadi originates from the Burning Sands, where the ritual was created, and is translated as "servant".