Storm giants, known as uvarjotunen in their own language, were one of the most intelligent and respected races of giants. Storm giants were the tallest of the true giants to remain on the Material Plane, standing a full 26 feet (7.9 meters) in height and massing out at around 15,000 pounds (6,800 kilograms). There were two ethnicities of storm giants; most had pale, light green skin and dark green hair and eyes, but a small number had violet skin, dark blue hair, and silver eyes. They tended to wear fine tunics and belted sandals. When it came to armor, they often favored the use of scale mail. Their bodies were impervious to harm from lightning and thunder, even that discharged by a blue dragon. They were even capable of generating and throwing bolts of lightning themselves, at distances of up to 500 feet (150 meters). Because of this they were often responsible for sightings of lightning bolts streaking across mountain peaks. Some storm giants held the ability to mark and claim a mortal humanoid as a sea spawn, either by cursing them or making a pact with them.