Rune Carving Initiate

You have begun learning the magical art of rune carving. You gain the following benefits:

• Increase your Constitution, Strength, or Dexterity score by 1, to a maximum of 20.
• To magically enhance your gear, you learn one rune of your choice from among the runes described in the Rune Knight archetype in the fighter class. Whenever you finish a long rest, you can touch an object and inscribe a rune onto that object. To be eligible, an object must be a weapon, a suit of armor, a shield, a piece of jewelry, or something else you can wear or hold in a hand. Your rune remains on an object until you finish a long rest, and an object can bear only one of your runes at a time. If a rune requires a saving throw, your Rune Magic save DC equals 8 + your proficiency bonus + your Constitution modifier. 
• Whenever you reach a level that grants the Ability Score Improvement feature, you can replace one rune you know with a different one from the list. If the rune has a prerequisite of any kind, you can choose that rune only if you meet the prerequisite.