A manual of bodily health was an arcane book that contained magically-infused texts, written to strengthen the reader’s body and improve endurance. The writings within covered topics of anatomy, diet, exercise, and physical discipline, blending arcane insight with practical training. Some volumes focused on fasting and breath control, while others detailed long courses of calisthenics or meditations on bodily awareness.
If the reader followed and completed the manual’s guidance over a period of 6 days, their constitution and physical resilience greatly increased, potentially surpassing natural limits. When this transformation occurred, the book’s magic transferred to the reader, leaving the manual ordinary and without power.