this.power = new MageInt(2);
this.toughness = new MageInt(3);
// Heroic — Whenever you cast a spell that targets Tethmos High Priest, return target creature card with converted mana cost 2 or less from your graveyard to the battlefield.
Ability ability = new HeroicAbility(new ReturnFromGraveyardToBattlefieldTargetEffect(), false);
Target target = new TargetCardInYourGraveyard(filter);
ability.addTarget(target);
this.addAbility(ability);
}