TargetPermanent auraTarget = new TargetCreaturePermanent();
this.getSpellAbility().addTarget(auraTarget);
this.getSpellAbility().addEffect(new AttachEffect(Outcome.BoostCreature));
Ability ability = new EnchantAbility(auraTarget.getTargetName());
this.addAbility(ability);
this.addAbility(new SimpleStaticAbility(Zone.BATTLEFIELD, new BoostEnchantedEffect(new PermanentsOnBattlefieldCount(filter), new PermanentsOnBattlefieldCount(filter), Duration.WhileOnBattlefield)));
}