Through the Fire and Flames

You snap your fingers and the world around you is engulfed in magical flames that even burns in the air around you. Any creature within the spell's area that fails a CON saving throw has to take 5d12 fire damage and half as much on a successful one. If the creature fails the save it gets lit on fire and takes 1d6 fire damage at the end of every turn spent inside the spell's area or until succeeding a CON saving throw on their turn.

You can choose creatures and objects to not be affected by the fire.