IT SEEMS A NUMBER of Blood and the Holy Grail readers have been spooked by this - but you shouldn't be. The Number Cards are derived from the Wheel; but, in isolation, their images can be interpreted in any way you wish. The point is that their circular sequence, which you can define as beginning anywhere, describes a discrete sequence of different outcomes, arranged in Creation's Order - which is the order in which they will occur.
If you have every employed statistical probability analysis to determine, numerically, what a likely outcome will be: you will note that the result depends upon the individual probabilities that you assign to each possible outcome. In other words, if the probabilities are wrong (and there is no way of determining if they are right) the result you calculate is no more likely than you having chosen the correct probabilities. No matter how you dress it up, no matter how you 'fine-tune' your probabilities from historical observations, for any number of finite possible outcomes over two: you are always more likely to be wrong in your mathematical predictions (particularly if you fail to include another possible outcome).
Probability analysis is just a means of giving weight to a hypothesis that has no basis in fact. Its proponents seek to convince us that they are right - by choosing what probabilities they assign to their mathematical formulae (and never declaring what those probabilities are).
The Delphic Oracle, on the other hand, is constructed in such a way as to make each outcome equally likely; and arrange the result of each individual outcome's success or failure in opposition to each other - so that the whole problem might be 'weighed.' Employing it forces you to analyse the problem you are trying to resolve, and ensures you do not omit possibilities.
The key lies in 'personalising' the number cards - in the same way that our ancestors assigned each god a character as a means of explaining the forces they represented. You won't get anywhere by treating them as real entities, and calling upon them to give you their power (unless you wish to be institutionalised) - just treat them in the same way as you did your childhood dolls and toy soldiers, assigning them a specific personality as a means of understanding how they react to each other.
Assign those personalities logically; use your right-brain to assign the most appropriate antonyms in the circumstances - and your left-brain to ensure it all fits. Imagine the problem as being located in the centre, with all the possible outcomes surrounding it.
If you wish, you can then transpose those personalised labels to the Wheel and examine your problem in relation to Creation's current 'mood;' and determine, by means of rotating the Wheel's rim and its pentacle, how it will naturally resolve.
There's no 'magic' here; in fact, the whole process is entirely logical if you subscribe to the 'wheels within wheels,' or 'as above so below' philosophies.
And, yes. So far, all the feedback from my readers is that it definitely works (and that's probably because it forces you to use both sides of your brain equally)..