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 [30th Anniversary Edition]](http://tcg.irresistibleforce.com.au/cdn/shop/products/594e2fa6-6551-5ac2-9c74-99cdcd1c29c7.jpg?v=1682039454&width=1445)
![Raging River [30th Anniversary Edition]](http://tcg.irresistibleforce.com.au/cdn/shop/products/1d8bdad9dc6dcee0247ac0edc2bb2798_4bfbf4db-6302-49e9-8310-b340db942457.jpg?v=1682039454&width=1445)
![Raging River [30th Anniversary Edition]](http://tcg.irresistibleforce.com.au/cdn/shop/files/df1d2fcc-e225-487d-93f0-fe95c86feb30.png?v=1783798653&width=1445)