Gryverns resemble wyverns, small dragons with two wings and two legs. Gryverns are green in color, with a short head. Gryverns can be trained and ridden, but their evil disposition make them a challenge to most.
When the evil creations of the Necromancer Kings took to the heavens, it was in the form of the terrible gryverns, which allowed those foul sorcerers to spread their corruption further and further throughout the realms.