In cartomancy with playing cards, the Jack of Spades (J♠) is the card of enmity.

Like all Jacks, it can represent a child, albeit rarely. When it does, the child is “problematic”, to use an abused word. He or she is either difficult or has a problem (for instance, he could be sick, and this is especially bad in pregnancy readings).

In general, this card represents the opposite of the Jack of Hearts, as it indicates a negative attitude and ill-will. It personifies the desire to hurt or to do something bad or illegal or at least somewhat shady.

In relationship readings, the Jack of Spades indicates poor communication, disharmony and possibily the desire to cheat. Together with a face card indicating another person outside of the couple, it can show a rival. Broadly, it shows underhandedness. It can also mean spying.

It can also signify more mundane things. For instance, after a disagreement, having the Jack of Spades near your partner’s card simply shows they still need time to get over their anger. In this sense, they are still your “enemy”. This can be true for every kind of personal relationship.

In work readings, the Jack of Spades can show the presence of ill will on the workplace, rivals and enemies of all kind. However, this is also the card of the uniform, and it is connected to jobs in the armed forces in a neutral sense.

Psychologically the card shows malice and a poor attitude in general, pettiness, double standards and slyness. Spiritually it’s connected to evil spirits,evil thought forms and being “bad” in general.

Combinations:

J♠ + K♠ = if pertinent, it indicates a policeman or soldier (if also 5♠, arrest)
J♠ + 9♦ + 3♠ = one possible combination of slander (9♦ is the reputation)
A♥ or 2♥ + J♠ = disharmony and enmity at home or close to you
J♠ + 5♦ + J♣ or any positive card, especially a ♥ = enmity turns to friendship
J♠ + 6♠ = it can indicate a morbidly negative attitude, in a health reading it can indicate parasites or viruses