Trolls (S. "Teryg", sing. "Torog") were born in utter darkness. Indeed, they bred underground and spent their waking hours during the night. Wild Trolls shunned daylight and preferred the illumination of a fire to the glistening aura of the moon. Most turned to rock if struck by the sun's rays, as if the spell that created the Teryg became unraveled. Trolls were huge and strong and had thick bodies and powerful limbs. Because they were by nature born of stone, Trolls had an extremely tough, scaly hide that protected them as well as fine, rigid leather armor. Troll-skin varied considerably in thickness, even at various spots on a given Troll, but it was usually strong enough to deflect the blows of most weaponry. The Tereg made formidable foes. There were numerous types of Wild Trolls. Some were grey or brown, others green. All, save Snow Trolls, had flat, often toeless feet, brown or black eyes, and black blood. They could be categorized in any number of ways, but the most common groupings follow (N = non-canonical):