abilities1.add(ability);
Abilities<Ability> abilities2 = new AbilitiesImpl<Ability>();
Ability ability2 = new SimpleActivatedAbility(Zone.BATTLEFIELD, new BoostTargetEffect(-4, -4, Duration.EndOfTurn), new ManaCostsImpl("{B}"));
ability2.addTarget(new TargetCreaturePermanent());
ability2.addCost(new TapSourceCost());
abilities2.add(ability2);
LevelerCardBuilder.construct(this,
new LevelerCardBuilder.LevelAbility(2, 3, abilities1, 2, 2),
new LevelerCardBuilder.LevelAbility(4, -1, abilities2, 4, 4)