How to use

DoubleStrikeAbility

in

mage.abilities.keyword

private boolean hasDoubleStrike(Permanent perm) {
  return perm.getAbilities().containsKey(DoubleStrikeAbility.getInstance().getId());
}

public AtarkaWorldRenderEffect() {
  super(Zone.BATTLEFIELD, new GainAbilityTargetEffect(DoubleStrikeAbility.getInstance(), Duration.EndOfTurn));
}

public RafiqOfTheManyAbility() {
  super(Zone.BATTLEFIELD, new GainAbilityTargetEffect(DoubleStrikeAbility.getInstance(), Duration.EndOfTurn));
}

public CleaverRiot(UUID ownerId, CardSetInfo setInfo) {
  super(ownerId, setInfo, new CardType[]{CardType.SORCERY}, "{4}{R}");
  // Creatures you control gain double strike until end of turn.
  this.getSpellAbility().addEffect(new GainAbilityControlledEffect(DoubleStrikeAbility.getInstance(), Duration.EndOfTurn, StaticFilters.FILTER_PERMANENT_CREATURE, false));
}

private boolean hasFirstOrDoubleStrike(Permanent perm) {
  return perm.getAbilities().containsKey(FirstStrikeAbility.getInstance().getId()) || perm.getAbilities().containsKey(DoubleStrikeAbility.getInstance().getId());
}

public BorosSwiftblade(UUID ownerId, CardSetInfo setInfo) {
  super(ownerId,setInfo,new CardType[]{CardType.CREATURE},"{R}{W}");
  this.subtype.add(SubType.HUMAN, SubType.SOLDIER);
  this.power = new MageInt(1);
  this.toughness = new MageInt(2);
  this.addAbility(DoubleStrikeAbility.getInstance());
}

public CreatureSimulator(Permanent permanent) {
  this.id = permanent.getId();
  this.damage = permanent.getDamage();
  this.power = permanent.getPower().getValue();
  this.toughness = permanent.getToughness().getValue();
  this.hasDoubleStrike = permanent.getAbilities().containsKey(DoubleStrikeAbility.getInstance().getId());
  this.hasFirstStrike = permanent.getAbilities().containsKey(FirstStrikeAbility.getInstance().getId());
  this.hasTrample = permanent.getAbilities().containsKey(TrampleAbility.getInstance().getId());
}

public TwoHeadedCerberus(UUID ownerId, CardSetInfo setInfo) {
  super(ownerId,setInfo,new CardType[]{CardType.CREATURE},"{1}{R}{R}");
  this.subtype.add(SubType.HOUND);
  this.power = new MageInt(1);
  this.toughness = new MageInt(2);
  // Double strike
  this.addAbility(DoubleStrikeAbility.getInstance());
}

protected int combatPotential(Permanent creature, Game game) {
  log.debug("combatPotential");
  if (!creature.canAttack(null, game)) {
    return 0;
  }
  int potential = creature.getPower().getValue();
  potential += creature.getAbilities().getEvasionAbilities().size();
  potential += creature.getAbilities().getProtectionAbilities().size();
  potential += creature.getAbilities().containsKey(FirstStrikeAbility.getInstance().getId()) ? 1 : 0;
  potential += creature.getAbilities().containsKey(DoubleStrikeAbility.getInstance().getId()) ? 2 : 0;
  potential += creature.getAbilities().containsKey(TrampleAbility.getInstance().getId()) ? 1 : 0;
  return potential;
}

public RageReflection(UUID ownerId, CardSetInfo setInfo) {
  super(ownerId, setInfo, new CardType[]{CardType.ENCHANTMENT}, "{4}{R}{R}");
  // Creatures you control have double strike.
  this.addAbility(new SimpleStaticAbility(Zone.BATTLEFIELD, new GainAbilityControlledEffect(DoubleStrikeAbility.getInstance(), Duration.WhileOnBattlefield, StaticFilters.FILTER_PERMANENT_CREATURE, false)));
}

public GoringCeratops(UUID ownerId, CardSetInfo setInfo) {
  super(ownerId, setInfo, new CardType[]{CardType.CREATURE}, "{5}{W}{W}");
  this.subtype.add(SubType.DINOSAUR);
  this.power = new MageInt(3);
  this.toughness = new MageInt(3);
  // Double Strike
  this.addAbility(DoubleStrikeAbility.getInstance());
  // Whenever Goring Ceratops attacks, other creatures you control gain double strike until end of turn.
  Effect effect = new GainAbilityControlledEffect(DoubleStrikeAbility.getInstance(), Duration.EndOfTurn, StaticFilters.FILTER_PERMANENT_CREATURE, true);
  effect.setText("other creatures you control gain double strike until end of turn");
  Ability ability = new AttacksTriggeredAbility(effect, false);
  this.addAbility(ability);
}

public NeedleSpiresToken() {
  super("", "2/1 red and white Elemental creature with double strike");
  cardType.add(CardType.CREATURE);
  subtype.add(SubType.ELEMENTAL);
  color.setRed(true);
  color.setWhite(true);
  power = new MageInt(2);
  toughness = new MageInt(1);
  addAbility(DoubleStrikeAbility.getInstance());
}
public NeedleSpiresToken(final NeedleSpiresToken token) {

public FencingAce(UUID ownerId, CardSetInfo setInfo) {
  super(ownerId,setInfo,new CardType[]{CardType.CREATURE},"{1}{W}");
  this.subtype.add(SubType.HUMAN);
  this.subtype.add(SubType.SOLDIER);
  this.power = new MageInt(1);
  this.toughness = new MageInt(1);
  // Double Strike
  this.addAbility(DoubleStrikeAbility.getInstance());
}

public BerserkersOnslaught(UUID ownerId, CardSetInfo setInfo) {
  super(ownerId,setInfo,new CardType[]{CardType.ENCHANTMENT},"{3}{R}{R}");
  // Attacking creatures you control have double strike.
  GainAbilityControlledEffect gainEffect = new GainAbilityControlledEffect(DoubleStrikeAbility.getInstance(), Duration.WhileOnBattlefield, new FilterAttackingCreature("Attacking creatures"), false);
  this.addAbility(new SimpleStaticAbility(Zone.BATTLEFIELD, gainEffect));
}

public HearthfireHobgoblin(UUID ownerId, CardSetInfo setInfo) {
  super(ownerId,setInfo,new CardType[]{CardType.CREATURE},"{R/W}{R/W}{R/W}");
  this.subtype.add(SubType.GOBLIN);
  this.subtype.add(SubType.SOLDIER);
  this.power = new MageInt(2);
  this.toughness = new MageInt(2);
  this.addAbility(DoubleStrikeAbility.getInstance());
}

public IroassChampion(UUID ownerId, CardSetInfo setInfo) {
  super(ownerId,setInfo,new CardType[]{CardType.CREATURE},"{1}{R}{W}");
  this.subtype.add(SubType.HUMAN);
  this.subtype.add(SubType.SOLDIER);
  this.power = new MageInt(2);
  this.toughness = new MageInt(2);
  // Double strike
  this.addAbility(DoubleStrikeAbility.getInstance());
}

public RidgetopRaptor(UUID ownerId, CardSetInfo setInfo) {
  super(ownerId, setInfo, new CardType[]{CardType.CREATURE}, "{3}{R}");
  this.subtype.add(SubType.DINOSAUR);
  this.subtype.add(SubType.BEAST);
  this.power = new MageInt(2);
  this.toughness = new MageInt(1);
  // Double strike
  this.addAbility(DoubleStrikeAbility.getInstance());
}

public MarisisTwinclaws (UUID ownerId, CardSetInfo setInfo) {
  super(ownerId,setInfo,new CardType[]{CardType.CREATURE},"{2}{R/W}{G}");
  this.subtype.add(SubType.CAT);
  this.subtype.add(SubType.WARRIOR);
  this.power = new MageInt(2);
  this.toughness = new MageInt(4);
  this.addAbility(DoubleStrikeAbility.getInstance());
}

public WreckingOgre(UUID ownerId, CardSetInfo setInfo) {
  super(ownerId,setInfo,new CardType[]{CardType.CREATURE},"{4}{R}");
  this.subtype.add(SubType.OGRE);
  this.subtype.add(SubType.WARRIOR);
  this.power = new MageInt(3);
  this.toughness = new MageInt(3);
  // Double strike
  this.addAbility(DoubleStrikeAbility.getInstance());
  // Bloodrush - {3}{R}{R}, Discard Wrecking Ogre: Target attacking creature gets +3/+3 and gains double strike until end of turn.
  Ability ability = new BloodrushAbility("{3}{R}{R}", new BoostTargetEffect(3, 3, Duration.EndOfTurn));
  ability.addEffect(new GainAbilityTargetEffect(DoubleStrikeAbility.getInstance(), Duration.EndOfTurn));
  this.addAbility(ability);
}

public ArashinForemost(UUID ownerId, CardSetInfo setInfo) {
  super(ownerId, setInfo, new CardType[]{CardType.CREATURE}, "{1}{W}{W}");
  this.subtype.add(SubType.HUMAN);
  this.subtype.add(SubType.WARRIOR);
  this.power = new MageInt(2);
  this.toughness = new MageInt(2);
  // Double strike
  this.addAbility(DoubleStrikeAbility.getInstance());
  // Whenever Arashin Foremost enters the battlefield or attacks, another target Warrior creature you control gains double strike until end of turn.
  Ability ability = new EntersBattlefieldOrAttacksSourceTriggeredAbility(new GainAbilityTargetEffect(DoubleStrikeAbility.getInstance(), Duration.EndOfTurn));
  ability.addTarget(new TargetControlledCreaturePermanent(filter));
  this.addAbility(ability);
}