The Trollocs are a race in the fictional universe of Robert Jordan's The Wheel of Time book series.
A Trolloc is a type of Shadowspawn created in the Age of Legends that comprises the bulk of the Dark One's armies. A crossing of human and animal stock, their physical characteristics are a blending of both lineages, horrifying almost all that come in contact with them. While capable of speech, they possess an intellect inferior to that of other sentient races and have proven difficult to utilize in battle unless supervised. They are carnivorous, sadistic, fearful and violent. Unlike other Shadowspawn, Trollocs are social creatures, grouped by several distinct tribes and capable of cruel and twisted humor.
A trolloc is a humanoid creature with both animal and human features, and this is most evident physically. A trolloc may have an animal-like snout, beak or head, hooved feet, feathers, or oversized rough hands with thick nails. Much as height and hair color differs between humans, so does the line between animal and human vary amongst individual trollocs. Some have feet capable of wearing boots, while others have legs far more like a goat, hoofed and unable to wear shoes. Many are physically capable of speech in the Trolloc tongue, but fewer are capable of speaking normally. Trollocs are significantly larger, taller, and stronger than most humans, being more on par with the Ogier in size. Their carnivorous, indiscriminate appetite is well known. Some can track a person by scent or sound. They see better than a man in the dark.
Mentally, Trollocs share more in common with the Shadow than average human mentality. They are cruel and sadistic, often killing simply for pleasure or for the act itself. It is this evil nature, and the acts that spring from it, that make Trollocs so easily detectable by a Sniffer. A trolloc's intelligence can vary from one creature to the next, but it is invariably much lower than the human stock from which it descends.
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Official Site: Robert Jordan
Links: Wikipedia WoT wiki Encyclopaedia Wheel of Time: Trollocs