Shana bests kirk

James T. Kirk, beaten by the thrall Shahna

Thrall was a term given by the Providers to the individuals of various species enslaved on the planet Triskelion. They were controlled by the master thrall, and trained by drill thralls.

The thralls were later freed by Captain James T. Kirk's actions. (TOS: "The Gamesters of Triskelion")

A thrall is a slave, whether someone in physical, mental, financial or even emotional slavery. The term originated in the Norse culture of old Earth, in the region of northern Europe once home to the Vikings. In its original context to be a thrall meant to be a slave or at best a serf, one who toiled exclusively for the benefit of a ruling class and who lived or died at their whim.