Dev: added additional info to some classes for easy debug;

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

@@ -1131,4 +1131,8 @@ public class Spell extends StackObjImpl implements Card {
         throw new UnsupportedOperationException("Spells should not loose all abilities. Check if this operation is correct.");
     }
 
+    @Override
+    public String toString() {
+        return ability.toString();
+    }
 }