Slaad are frog-like creatures from Kythri: The Churning Chaos, in some locations where the connection to the plane is especially strong, they may slip between the planes and visit Eberron.
Slaadi, in their base form, resemble large, bipedal frogs with long, sharp claws, wide mouths filled with pointed teeth and huge heads. Embedded in most of their skulls was a gemstone the size and shape of a human child's fist, a jewel that shared their color and that could be seen beneath their forehead skin. Looking closely, one could see that symbols were carved into the shard, markings unique to the slaad which could be used to determine its past kills, conquests, duels and other deeds. If one could decipher the meaning of the tattoo, it could be used to determine the relative strength of the slaad, with other slaads being able to immediately identify the slaad by their mark.Despite generally sharing the same basic, if baffling, appearance, slaadi were nonetheless creatures of chaos and so no two were exactly identical. They always had at least mild differences in height, build and eye position even within their own subtype, some breeds being human-sized and gangly while others were huge and muscular, and many possessed even more distinguishing traits. While some classified slaads by color, slaads of the same breed could vary not only in their exact shade and pattern but also be of the opposite color entirely.