Apprentice's Robes

If you aren't wearing armour, your base armour is 13 + dex

you can add half of your proficiency bonus (rounded down) to any intelligence, wisdom or charisma saving throws that doesn't already add your proficiency bonus

your spell save DC and spell attack bonus increase by 1

FULL CREDIT TO TheArenaGuy ON REDDIT (HE MAKES COOL STUFF CHECK HIM OUT)

Notes: Half Proficiency: Saving Throws, Half Proficiency: Saving Throws, Half Proficiency: Saving Throws, Bonus: Spell Attacks, Bonus: Spell Save DC, Attuneable by Wizard, Warlock, Sorcerer