I sell emotional sustenance on an underground website. Happiness, love, and courage can all be priced. Until I found out that the top rich man who bought my happiness was actually the culprit who caused my mother to lie in the ICU. Now, he sent an order with a sky-high price and named me to buy the "fear" that I had stored away for a long time.
I put on my extraction helmet, disguising my quenched hatred as the fear he wanted. When the transaction was completed, he left a line on the encrypted channel:
"The emotions are very pure, but next time please just sell me the 'killing intent' - that's what you really want to give me, isn't it?"