You conjure a wall of fluttering green and gold leaves that last until the end of the encounter. The wall can be up to 4 squares high. Any ally who is within the wall or being attacked through it has concealment. Any enemy that enters the wall's space or starts its turn there grants combat advantage until the end of that enemy's next turn.
You conjure a leafy wall that lasts until the end of the encounter. The wall can be up to 4 squares high and must be on a solid surface. You or any ally has partial concealment while in the wall. Enemies grant combat advantage while in the wall or adjacent to it.