public override object Evaluate(List <string> args, ExpressionEvaluator evaluator, Creature player, Target target, CastedSpell spell, RollResults dice = null)
        {
            ExpectingArguments(args, 1);

            string trailingEffects = evaluator.Evaluate <string>(args[0]);

            player.AddTrailingEffects(trailingEffects);

            return(null);
        }