Professor Ryze is a limited skin, or is only for riot events?
You can purchase him just like any other regular skin.
I think it's called trophy ryze or something that comes from winning tourneys.
Friend of Urf
Check the store. It's there. It's just a normal skin.
© 2013 Riot Games, Inc. All rights reserved. Riot Games, League of Legends and PvP.net are trademarks, services marks, or registered trademarks of Riot Games, Inc.