// {GU}: Groundling Pouncer gets +1/+3 and gains flying until end of turn. Activate this ability only once each turn and only if an opponent controls a creature with flying.
Condition condition = new GroundingPouncerCondition();
Effect effect = new BoostSourceEffect(1, 3, Duration.EndOfTurn);
Effect effect2 = new GainAbilitySourceEffect(FlyingAbility.getInstance(), Duration.EndOfTurn, false, true);
Ability ability = new ConditionalActivatedAbility(Zone.BATTLEFIELD, effect, new ManaCostsImpl("{G/U}"), condition, rule);
ability.addEffect(effect2);
this.addAbility(ability);
this.addWatcher(new ActivatedAbilityUsedThisTurnWatcher());
}