Dragon Scales

Draconic scales encompass the caster's body, partially shielding them from the damaging effect. The scales are metallic or chromatic, depending on the caster's bloodline, and take the color associated with the triggering damage type. You have resistance to the triggering damage type until the start of your next turn. Also, until the end of your next turn, your unarmed strikes deal an additional 1d6 damage of the triggering type.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the extra damage increases by 1d6 for each slot level above 1st.