Onos T'oolan, also known as "Tool", was a clanless, or unbound, T'lan Imass warrior, though he had originally been part of the clan. All the others of his clan had perished in the 28th He was over three hundred thousand years old, having been born the ninth son of his clan before the Sixth Jaghut War.
Onos was a squat man with robust bones. Like other Imass, his leathery skin was a shiny nut brown, and his thinned flesh had the consistency of oak roots. His muscles had torn patches. Onos had a heavy chinless jawbone, high cheeks, a pronounced brow ridge, and his eyesockets were dark holes. He dressed in rotting furs and wore the skull-cap of a horned beast as a helmet, one horn broken at its base. He bore a flint sword in his skeletal arms.