Tuma

Tuma was the cruel, warlike leader of the Rock Tribe and the Skrall. He was a master of the sword and carried a Thornax launcher. He was obsessed with conquering Bara Magna, and if he could not have it, he would grind the planet to dust. Tuma was considerably bigger than the other Skrall, as he was a specialised leadership class of Skrall. This class of Skrall were wiped out by mysterious, shapeshifting beings in the rock tribe's early history, until only Tuma himself remained to lead the rock tribe to move further south to Roxtus.

The source of this information is the 2009 page, which takes its sources from official Lego product descriptions and information given by Greg Farshtey.