User blog comment:ZeroPath/An interesting idea I came up with/@comment-4883076-20130709193009

I'm wondering why no one thought this up,it would be really cool,you could use air to push objects and solve puzzles,water to make crossing oceans easier and for defense,earth and fire could be for attack,and the smaller sub-elements(sand,ice,metal etc)could be learned,but would this be set in last airbender time or Legend of Korra?