ZapEffect.cs

[Serializable]
public class ZapEffect : BaseEffect {

    private int[] _damagePerCharge = new int[] { 1, 2, 3 };

    public override void Apply()
    {
        int multiplier = (Ability as Spell).Charges.Percentage == 1 ? 2 : 1;
        int damage = _damagePerCharge[Ability.Level] * (Ability as Spell).Charges.Current * multiplier;
        BattleApp.Instance.ResolveDamage(damage, BattleApp.Instance.CurrentPlayer, BattleApp.Instance.CurrentTarget, DamageType.Wind);
    }

    public override string DescriptionForLevel(int level)
    {
        return string.Format(Strings.CARD_ZAP_DESCRIPTION, _damagePerCharge[level]);
    }
}