Your palm glows white hot as you press it into a creature you try to touch. Make a melee spell attack against the target. On a hit, the target takes 2d6 fire damage, and it is vulnerable to fire until the end of your next turn. 

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