Religion is a range of social-cultural systems, including designated behaviors and practices, ethics, morals, beliefs, worldviews, texts, sanctified places, prophecies, or organizations, that generally relate humanity to supernatural, transcendental, and spiritual elements—although there is no scholarly consensus over what precisely constitutes a religion.
It is not a spiritual practice or religious belief because of the deck of cards it uses - it’s because tarot reading is a supernatural means of generating prophecies.
I am aware of what Tarot is - to quote wikipedia:
It is not a spiritual practice or religious belief because of the deck of cards it uses - it’s because tarot reading is a supernatural means of generating prophecies.