Firbolgs have some innate spellcasting from their Firbolg Magic ability. They are able to Forged Detect Magic plus a modified method of Disguise Self that makes it possible for them to look 3ft shorter to Mix in with humanoid creatures like elves. Firbolgs are creatures of nature and hidden guardians https://warforged-artificer58035.blogofchange.com/28574689/helping-the-others-realize-the-advantages-of-eberron-d-d