- For triggers with no Valid Target Candidates, just cancel them instead of asking for targets.

src/main/java/forge/card/spellability/TargetSelection.java

@@ -214,6 +214,13 @@ public class TargetSelection {
             }
         }
         
+        if (!this.target.hasCandidates(this.ability, true)) {
+            // Cancel ability if there aren't any valid Candidates
+            this.bCancel = true;
+            this.req.finishedTargeting();
+            return false;
+        }
+
         this.chooseValidInput();
 
         return false;