Abilities<Ability> abilities1 = new AbilitiesImpl<Ability>();
abilities1.add(FlyingAbility.getInstance());
Abilities<Ability> abilities2 = new AbilitiesImpl<Ability>();
abilities2.add(FlyingAbility.getInstance());
abilities2.add(new SimpleStaticAbility(Zone.BATTLEFIELD, new BoostControlledEffect(1, 1, Duration.WhileOnBattlefield, filter, true)));
LevelerCardBuilder.construct(this,
new LevelerCardBuilder.LevelAbility(2, 3, abilities1, 3, 3),
new LevelerCardBuilder.LevelAbility(4, -1, abilities2, 4, 4)
);