Remember that Steak

Your people are chubby, with a knack for raising your cholesterol. You have learned a trick to swell the fatty globules inside your blood for a brief time. You gain the following benefits:

• Increase your Constitution score by 1, to a maximum of 20.
• As a reaction, you can inflate your fatness, giving you four times your Proficiency modifier as temporary hit points until the end of your next turn. Once you use this ability, you can’t do so again until you finish a short or long rest.