public override object Evaluate(List <string> args, ExpressionEvaluator evaluator, Creature player, Target target, CastedSpell spell, RollResults dice = null) { ExpectingArguments(args, 1); VantageKind vantageKind = Expressions.Get <VantageKind>(args[0], player, target, spell); if (player is Character characterPlayer) { player.AddVantageThisRoll(vantageKind); } return(null); }