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.
Learn Something New
The Page of Pentacles from the Wizards Tarot
The first six months of quarantine have been very difficult for me (this is written in August; and I'm sure I'm not alone). One of the things that really helped me was...