What was this mmorpg?

Hello, I've been trying to remember what the name of this mmorpg was that I played some years ago/was in beta for.

I remember that it had some unique things about it. It was a fantasy'ish mmorpg, however you could do things in it such as fly (via hang gliders), you had mounts such as a dodo-bird like mount.

It wa sa sandbox style world, very open/go where you want.

It also had snow with depth and you could even slide down the snow on your shield, sledding basically.

I know it isn't much to go on but this is what I mainly remember about it, I can't for the life of me remember the name.