How to use

apply

method

in

mage.abilities.effects.common.WishEffect

@Override
public boolean replaceEvent(GameEvent event, Ability source, Game game) {
  Player controller = game.getPlayer(source.getControllerId());
  if (controller != null) {
    new WishEffect(new FilterCard(), false).apply(game, source);
    this.discard();
    return true;
  }
  return false;
}