Whenever one or more creatures you control attack, each defending player divides all creatures without flying they control into a "left" pile and a "right" pile. Then, for each attacking creature you control, choose "left" or "right." That creature can't be blocked this combat except by creatures with flying and creatures in a pile with the chosen label.
![Raging River [International Collectors' Edition]](http://paradoxtcg.com/cdn/shop/products/111996b9-8050-51be-9b12-14286fd9e7a5.jpg?v=1702330873&width=1445)
