How to use

TapLandForManaAllTriggeredAbility

in

mage.abilities.common

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

@Override
public boolean checkTrigger(GameEvent event, Game game) {
  Permanent permanent = game.getPermanentOrLKIBattlefield(event.getSourceId());
  if (permanent != null && permanent.isLand()) {
    if (setTargetPointer) {
      getEffects().get(0).setTargetPointer(new FixedTarget(permanent, game));
    }
    return true;
  }
  return false;
}

public StormCauldron(UUID ownerId, CardSetInfo setInfo) {
  super(ownerId,setInfo,new CardType[]{CardType.ARTIFACT},"{5}");
  // Each player may play an additional land during each of their turns.
  this.addAbility(new SimpleStaticAbility(Zone.BATTLEFIELD, new PlayAdditionalLandsAllEffect()));
  // Whenever a land is tapped for mana, return it to its owner's hand.
  Effect effect = new ReturnToHandTargetEffect();
  effect.setText("return it to its owner's hand");
  this.addAbility(new TapLandForManaAllTriggeredAbility(effect, false, true));
}