[AFR] Implemented You Come to a River

Mage/src/main/java/mage/abilities/Ability.java

@@ -467,13 +467,21 @@ public interface Ability extends Controllable, Serializable {
     Ability setAbilityWord(AbilityWord abilityWord);
 
     /**
-     * Set flavor word for whole ability (if you need flavor word for choices then call it from mode)
+     * Sets flavor word for whole ability
      *
      * @param flavorWord
      * @return
      */
     Ability withFlavorWord(String flavorWord);
 
+    /**
+     * Sets flavor word for first mode
+     *
+     * @param flavorWord
+     * @return
+     */
+    Ability withFirstModeFlavorWord(String flavorWord);
+
     /**
      * Creates the message about the ability casting/triggering/activating to
      * post in the game log before the ability resolves.

Mage/src/main/java/mage/abilities/AbilityImpl.java

@@ -1078,6 +1078,12 @@ public abstract class AbilityImpl implements Ability {
         return this;
     }
 
+    @Override
+    public Ability withFirstModeFlavorWord(String flavorWord) {
+        this.modes.getMode().withFlavorWord(flavorWord);
+        return this;
+    }
+
     @Override
     public String getGameLogMessage(Game game) {
         if (game.isSimulation()) {

Mage/src/main/java/mage/game/stack/StackAbility.java

@@ -501,6 +501,11 @@ public class StackAbility extends StackObjectImpl implements Ability {
         throw new UnsupportedOperationException("Not supported.");
     }
 
+    @Override
+    public Ability withFirstModeFlavorWord(String flavorWord) {
+        throw new UnsupportedOperationException("Not supported.");
+    }
+
     @Override
     public boolean activateAlternateOrAdditionalCosts(MageObject sourceObject, boolean noMana, Player controller, Game game) {
         throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.