This book contains health and nutrition tips, and its words are charged with magic. If you spend 48 hours over a period of 6 days or fewer studying the book’s contents and practicing its guidelines, your Constitution increases by 2, to a maximum of 30. The manual then loses its magic but regains it in a century.
RollQuest summary 48 hours of study over 6 days or fewer: Constitution +2, to a maximum of 30. The manual then loses its magic for a century.
RollQuest ships the D&D 2024 SRD as a content pack, on a 5e character sheet that does the maths - roll from the sheet and let the numbers work themselves out. Free to start.