this.color.setGreen(true);
this.power = new MageInt(2);
this.toughness = new MageInt(2);
// Beast spells you cast cost {1} less to cast.
this.addAbility(new SimpleStaticAbility(Zone.BATTLEFIELD, new SpellsCostReductionControllerEffect(filter, 1)));
// {1}{G}: Regenerate target Beast.
SimpleActivatedAbility ability = new SimpleActivatedAbility(Zone.BATTLEFIELD,
new RegenerateTargetEffect(),
new ManaCostsImpl("{1}{G}"));
Target target = new TargetCreaturePermanent(filterTarget);