Grass Release: Moss Wall

The user creates a large wall of moss to protect them from attacks. This technique is weak against fire release techniques, as the moss will burn as well as any other plant. However, it is impervious to water release attacks. When water hits the wall, it gets absorbed by the moss. The wall swells up with the water and becomes stronger. When this happens, it is able to hold off weak fire attacks.

Trivia

 * The water absorption comes from traits of real moss. Some species of moss can absorb twenty times their weight of water.