How to use

CantBeTargetedTargetEffect

in

mage.abilities.effects.common

@Override
public CantBeTargetedTargetEffect copy() {
  return new CantBeTargetedTargetEffect(this);
}

@Override
public boolean applies(GameEvent event, Ability source, Game game) {
  if (getTargetPointer().getTargets(game, source).contains(event.getTargetId())) {
    if (targetController == TargetController.OPPONENT
        && !game.getOpponents(source.getControllerId()).contains(event.getPlayerId())) {
      return false;
    }
    StackObject stackObject = game.getStack().getStackObject(event.getSourceId());
    MageObject sourceObject;
    if (stackObject instanceof StackAbility) {
      sourceObject = ((StackAbility) stackObject).getSourceObject(game);
    } else {
      sourceObject = stackObject;
    }
    if (sourceObject != null && filterSource.match(sourceObject, game)) {
      return true;
    }
  }
  return false;
}

public VinesOfVastwood(UUID ownerId, CardSetInfo setInfo) {
  super(ownerId,setInfo,new CardType[]{CardType.INSTANT},"{G}");
  // Kicker {G} (You may pay an additional {G} as you cast this spell.)
  this.addAbility(new KickerAbility("{G}"));
  // Target creature can't be the target of spells or abilities your opponents control this turn.
  this.getSpellAbility().addTarget(new TargetCreaturePermanent());
  this.getSpellAbility().addEffect(new CantBeTargetedTargetEffect(filter, Duration.EndOfTurn, TargetController.OPPONENT));
  // If Vines of Vastwood was kicked, that creature gets +4/+4 until end of turn.
  this.getSpellAbility().addEffect(new ConditionalContinuousEffect(new BoostTargetEffect(4, 4, Duration.EndOfTurn),
      new LockedInCondition(KickedCondition.instance), staticText));
}