User blog comment:Meat Bun Pie/Regarding Champion Concepts/@comment-5791947-20141006072354

I kinda feel like Yasuo's wind was loosely based on the speed resource I did a year before his release. Wind barriers and Azir's shield is also loosely connected to the Mitori I did, also more than a year ago.

There does seem to be a small possibility that champion designers are taking a leaf or two from concepts that really have valuable perks in them anonymously. I wouldn't mind at all though, personally, even if they totally took a copy of whatever I made in the past. I treat them as open source.