Condition thresholdCondition = new CardsInControllerGraveCondition(7);
// Threshold - As long as seven or more cards are in your graveyard, Bloodcurdler gets +1/+1 and has "At the beginning of your end step, exile two cards from your graveyard."
Ability thresholdAbility = new SimpleStaticAbility(Zone.BATTLEFIELD,
new ConditionalContinousEffect(new BoostSourceEffect(1, 1, Duration.WhileOnBattlefield), thresholdCondition,
"<i>Threshold</i> - If seven or more cards are in your graveyard, {this} gets +1/+1"));
ContinuousEffect effect = new GainAbilitySourceEffect(new BeginningOfEndStepTriggeredAbility(new ExileCardFromOwnGraveyardControllerEffect(2), TargetController.YOU, false));
thresholdAbility.addEffect(new ConditionalContinousEffect(effect, thresholdCondition,
"and has \"At the beginning of your end step, exile two cards from your graveyard.\""));
this.addAbility(thresholdAbility);
}