How to use

SkipUntapStepEffect

in

mage.abilities.effects.common

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

public SandsOfTime(UUID ownerId, CardSetInfo setInfo) {
  super(ownerId, setInfo, new CardType[]{CardType.ARTIFACT}, "{4}");
  // Each player skips their untap step.
  this.addAbility(new SimpleStaticAbility(Zone.BATTLEFIELD, new SkipUntapStepEffect()));
  // At the beginning of each player's upkeep, that player simultaneously untaps each tapped artifact, creature, and land he or she controls and taps each untapped artifact, creature, and land he or she controls.
  this.addAbility(new BeginningOfUpkeepTriggeredAbility(Zone.BATTLEFIELD, new SandsOfTimeEffect(), TargetController.ANY, false));
}

public Stasis(UUID ownerId, CardSetInfo setInfo) {
  super(ownerId,setInfo,new CardType[]{CardType.ENCHANTMENT},"{1}{U}");
  // Players skip their untap steps.
  this.addAbility(new SimpleStaticAbility(Zone.BATTLEFIELD, new SkipUntapStepEffect()));
  // At the beginning of your upkeep, sacrifice Stasis unless you pay {U}.
  this.addAbility(new BeginningOfUpkeepTriggeredAbility(new SacrificeSourceUnlessPaysEffect(new ManaCostsImpl("{U}")), TargetController.YOU, false));
}