Wayne's Actual Burning Hands

"What the hell do you mean 'Burning Hands' doesn't set your hands on fire? It's in the damn title!"
-Wayne A. Delia, Wizard With Very Little Reading Comprehension

You touch an ally's hands with your hand, and a spark ignites upon their fists to set them ablaze. The next time they make an unarmed strike, on a hit, their strike deals an extra 1d6 fire damage. The flame is magically snuffed out only after the ally performs this unarmed strike (regardless of whether they hit or miss), or if they do not perform an unarmed strike within the next minute.

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