- "…Storm the battlefield with Tyth, god of rage. The Firstborn of Izax and Scyva leads us to victory against the profane outlanders. Raise your bloodied fist and cry triumph…"
- ―"The Awe of Tyth," part of a Zakuulan devotional text
Tyth, the Firstborn, was the warrior god and avatar of rage among the six primary Old Gods, the deities worshiped by the people of the planet Zakuul prior to Valkorion's ascension to Immortal Emperor. The first of the four children of Izax and Scyva, Tyth was accompanied on the battlefield by his sister Aivela, and Zakuulans believed that Tyth would lead them to victory against outlanders .
- Star Wars: The Old Republic: Knights of the Fallen Empire (First mentioned)
- Star Wars: The Old Republic: Knights of the Eternal Throne (Mentioned only)