@Override public boolean perform(Game game, Event event, Map<Parameter, MagicSet> parameters) { MagicSet cause = parameters.get(Parameter.CAUSE); event.setResult(Empty.set); Set<Color> choices = parameters.get(Parameter.CHOICE).getAll(Color.class); Player player = parameters.get(Parameter.PLAYER).getOne(Player.class); PlayerInterface.ChooseParameters<Color> chooseParameters = new PlayerInterface.ChooseParameters<Color>( 1, 1, new LinkedList<Color>(choices), PlayerInterface.ChoiceType.COLOR, PlayerInterface.ChooseReason.CHOOSE_COLOR); chooseParameters.thisID = cause.getOne(GameObject.class).ID; List<Color> chosenList = player.choose(chooseParameters); if (chosenList.isEmpty()) return false; Color color = chosenList.get(0); Class<? extends Protection> ability = Protection.from(color); ContinuousEffect.Part part = new ContinuousEffect.Part(ContinuousEffectType.ADD_ABILITY_TO_OBJECT); part.parameters.put( ContinuousEffectType.Parameter.OBJECT, Intersect.instance( HasColor.instance(Color.WHITE), Intersect.instance( HasType.instance(Type.CREATURE), ControlledBy.instance(You.instance())))); part.parameters.put( ContinuousEffectType.Parameter.ABILITY, Identity.instance(new SimpleAbilityFactory(ability))); Map<Parameter, MagicSet> fceParameters = new HashMap<Parameter, MagicSet>(); fceParameters.put(Parameter.CAUSE, cause); fceParameters.put(Parameter.EFFECT, new MagicSet(part)); Event protection = createEvent( game, "White creatures you control gain protection from the chosen color until end of turn.", EventType.CREATE_FLOATING_CONTINUOUS_EFFECT, fceParameters); protection.perform(event, false); return true; }