Giant's Runes

Long before Giant society fell, they had mastered their own unique form of magic, focusing the surrounding arcana into runes to release their potential. As a descendent of Giants, your mind is one of few to be able to comprehend and remaster this lost art. Taking this feat grants the following abilities:

• Increase your Constitution by 1, to a total of 20.
• Choose a 1st, 2nd and 3rd level spell. Once per long rest, you may inscribe two of these spells as a rune upon a surface, object or creature as an action. Once inscribed, you may activate the rune as a bonus action (or reaction if it is a reaction spell) using your Constitution modifier as your spell casting ability. These runes are spell-like-effects and therefore cannot be countered or dispelled. Additionally, the spells no longer require verbal, material or somatic components. The spells must be those of action, bonus action or reaction casting time and also they must not consume material components upon use. (For Spell Save DC it is 8 + CON Modifier + Proficiency Bonus, for Spell Attack it is CON Modifier + Proficiency Bonus)
• Finally, whenever you gain a level you may replace one of the spells from your rune list with another of the same level.