A humorous reference to carbon monoxide. When charcoal for incense is burned, it can exhaust the air of oxygen and replace it with carbon monoxide (chemical formula: CO). The lack of oxygen can cause dizziness, sickness, unconsciousness, or death. A magician should always have plenty of air in a room when burning incense.
The Dark Wood Tarot
We usually feature stand alone books here. However, our decks' companion books are all excellent in their own right. Here is an example from the Sasha Graham's Dark Wood Tarot.
Strength is the archetype...