Your hand blazes with scorching heat.

On Targets:

Make a melee spell attack against a creature you can reach. On a hit the target takes 3d6 fire damage. If you grapple the target, at the end of each of its turns, the target can make a STR (athletics) or a DEX (acrobatics) saving throw. The target takes 1d6 fire damage on a failed save, or half as much damage on a successful one.

On Objects & Materials:

Objects & materials touched are affected by the heat of your palm depending on the spell slot level used.  Consult the material table to see the results of your touch. 

Any target in physical contact with the object or material takes 1d6 fire damage when you cast the spell. Until the spell ends and as long as you are touching the object/ material the target must succeed on a Constitution saving throw or drop the object/ material if it can. If it doesn't drop the object, it has disadvantage on attack rolls and ability checks until the start of your next turn.

At higher levels:

When you cast this spell using a spell of 2nd lever or higher:

• the damage increases by 1d6 for each slot level above 1st on targets
• consult the material table to see the results of the spell on objects and materials for each slot above 1st.
• any target in physical contact with an object or material takes 1d6 additional fire damage for each slot above 1st.

Material table