Boggard Swamp Magic

As a Boggard, you can summon and control magical little fireflies that are integral to speaking your native language, Boggin, as well as enable you to cast certain spells at different levels.

At 1st level, you learn the dancing lights cantrip.
At 3rd level, you learn the faerie fire spell, and can cast it once per Long Rest without the need for verbal, somatic or material components. 
At 5th level, you learn the hypnotic pattern spell, and can cast it once per Long Rest without the need for verbal, somatic or material components.

Charisma is your trait for casting these spells. Your spell-save DC equals 8 + your Proficiency Bonus + your Charisma modifier.