// Deathtouch
this.addAbility(DeathtouchAbility.getInstance());
// {6}{B}{B}: Monstrosity 3.
this.addAbility(new MonstrosityAbility("{6}{B}{B}", 3));
// When Hythonia the Cruel becomes monstrous, destroy all non-Gorgon creatures.
this.addAbility(new BecomesMonstrousSourceTriggeredAbility(new DestroyAllEffect(filter)));
}