// Choose one - Exile all cards from target player's graveyard;
this.getSpellAbility().addEffect(new ExileGraveyardAllTargetPlayerEffect());
this.getSpellAbility().addTarget(new TargetPlayer());
// or Jund Charm deals 2 damage to each creature;
Mode mode = new Mode();
mode.getEffects().add(new DamageAllEffect(2, new FilterCreaturePermanent()));
this.getSpellAbility().addMode(mode);
// or put two +1/+1 counters on target creature.
mode = new Mode();
mode.getEffects().add(new AddCountersTargetEffect(CounterType.P1P1.createInstance(2), Outcome.BoostCreature));
mode.getTargets().add(new TargetCreaturePermanent());