TargetCardInHand target = new TargetCardInHand(new FilterLandCard());
Cost cost = new DiscardTargetCost(target);
if (cost.canPay(source, source.getSourceId(), source.getControllerId(), game) &&
player.chooseUse(outcome, "Discard land? (Otherwise Mox Diamond goes to graveyard)", game) &&
player.chooseTarget(Outcome.Discard, target, source, game)){
player.discard(game.getCard(target.getFirstTarget()), source, game);
return false;
}
else{
Card card = game.getCard(event.getTargetId());
if (card != null) {