Do you mean you would like to create a Magus card, (the Magician) of your own? Are you creating a tarot deck? Wouldn't it be better to have a look at one yourself?
It would be best, if you are interested in creating tarot cards, to learn something about the Tarot first, what the cards mean, the symbolism.
To be honest, the first deck I bought, I only bought for this very reason. I wanted to create my own deck, (on opera characters) and thought I ought to know a little about the tarot... So I bought the Thoth tarot, in a pocket version, it came together with a very book by Hajo Banzhaff/Akron going into great detail about every symbol and myth associated with each card.
But... be warned...you'll get hooked...