Enveloping Flames

You create an aura of flame around you, and you are immune to fire damage and have resistance to cold damage.  Each creature within range, other than you, must succeed on a Dexterity saving throw or take 1d6 fire damage.

The flames spread to all flammable materials and terrain around you. 

This spell’s damage increases by 1d6 when you reach 5th level (2d6), 11th level (3d6), and 17th level (4d6).