We were showing Wolf Soul where the elemental clever is on Jacinto in Gears of War 3 when i took this pic. He looks very cool.
To get the clever, you shoot 4 specific rain gutters on 4 different buildings; buy the boomshot in the middle of the map at the edge of the glowy river; boomshot the gutter on the wall above the river and then wait for the next wave. Then buy the hammer of dawn (same place you bought the boomshot) and fire it into the river. A walkway will rise. Make sure you do it long enough. Then you will be able to walk across and get the glowy elemental clever.