How to use

iterator

method

in

mage.cards.Cards

Card card = cards.get(cards.iterator().next(), game);
Permanent permanent = game.getPermanent(card.getId());
if (permanent != null) {
Card card = cards.get(cards.iterator().next(), game);
Permanent permanent = game.getPermanent(card.getId());
if (permanent != null) {                    

Cards hand = player.getHand();
while (!hand.isEmpty()) {
  Card card = hand.get(hand.iterator().next(), game);
  if (card != null) {
    card.moveToExile(getId(), "Memory Jar", source.getSourceId(), game);

Cards hand = player.getHand();
while (!hand.isEmpty()) {
  Card card = hand.get(hand.iterator().next(), game);
  if (card != null) {
    card.moveToExile(getId(), "Magus of the Jar", source.getSourceId(), game);

Card commander = this.getCard(player.getSideboard().iterator().next());
if (commander != null) {
  player.addCommanderId(commander.getId());

moveObjectToLibrary(cards.iterator().next(), source == null ? null : source.getSourceId(), game, false, false);

discardedCards.addAll(this.getHand());
while (!this.getHand().isEmpty()) {
  discard(this.getHand().get(this.getHand().iterator().next(), game), source, game);

Card card = cards.get(cards.iterator().next(), game);
card.moveToZone(Zone.LIBRARY, source.getSourceId(), game, true);

card = game.getCard(cards.iterator().next()); 
if (card != null) {
  controller.moveCards(card, Zone.HAND, source, game);

moveObjectToLibrary(cards.iterator().next(), sourceId, game, true, false);

Card card = revealed.get(revealed.iterator().next(), game);
controller.moveCardToLibraryWithInfo(card, source.getSourceId(), game, Zone.LIBRARY, true, false);

Card card = cards.get(cards.iterator().next(), game);
controller.moveCards(card, Zone.GRAVEYARD, source, game);
card.moveToZone(Zone.GRAVEYARD, source.getSourceId(), game, true);

Card card = chosen.get(chosen.iterator().next(), game);
controller.moveCardToLibraryWithInfo(card, source.getSourceId(), game, Zone.LIBRARY, true, false);

Card card = cards.get(cards.iterator().next(), game);
if (card != null) {
  controller.moveCardToLibraryWithInfo(card, source.getSourceId(), game, Zone.LIBRARY, false, false);