Website: Dreamlords
You control your base on the website and play the game by downloading the client in which you can also control your base and play your army around.
game got pvp, co-op, sp, guilds, market etc.
Once a while they restart the game and everyone starts from the beginning again. Your traits which you get for researching and your dreamlord and his stuff and a few special items are the only thing that you get transfered to the next 'era'.