Developers website http://product.gree.net/us/en/games/cerberus-age
There is no race/classes its an online rpg card game
Cerberus Age is an online card game created by GREE. It is set in a fantasy world where three kingdoms wage war for supremacy. You will perform quests, collect powerful units, join forces with allies and show your strength in battle!
Cerberus Age is now in the system. :)
Noel Mabry commented
The three kings/rulers are
Thanks so much