// Flying
this.addAbility(FlyingAbility.getInstance());
// Whenever Oros, the Avenger deals combat damage to a player, you may pay {2}{W}. If you do, Oros deals 3 damage to each nonwhite creature.
this.addAbility(new DealsCombatDamageToAPlayerTriggeredAbility(
new DoIfCostPaid(new DamageAllEffect(3, filter), new ManaCostsImpl("{2}{W}")), false));
}