They can be trained and will obey commands, such as "Away" (making them leave the area) even during the heat of battle. They can bear the weight of a Shardbearer easily and can communicate with them. They barely require 'handlers'.
Besides being larger than regular horses, Ryshadium also have a few other unique features. They have stone hooves that are stronger and more durable than a regular horse's hooves, and never need to be trimmed. They also have a large rectangular pupil in the center of each their eyes.