In my old world, there were stories of people who sucked the blood of others to feed their eternal life. There was no evidence that they were real, of course. They were much more believable as allegories and embellishments of tax collectors, extorters, and cruel aristocrats.
The One True God abhors the drinking of blood. Not even specifically human blood, but even the blood of animals. While the stories from my old world borrowed this taboo to establish the inherent and immutable evil of a mythical being, the being I encountered is real, and I witnessed it drink my blood. There is no question that it has transgressed against the One True God today and likely on many others days.
After the bloodsucker escaped, the forest felt much safer. I searched the forest floor for flowers. I found one, then a few, then a patch with dozens of purple flowers.
I picked some flowers from the patch, leaving plenty to replenish it, and returned to town.
"Twenty-four flowers!?! Where did you find these?!" The guild receptionist was shocked by the amount.
"I went to the field mentioned in the quest."
"We get ten of these per season at most! If there's somewhere else they grow, you have to tell us!"
Maybe the reason they harvest so few is because they overpick the flowers. In that case, I'd better not tell them. "I'm telling you, I went to the field and picked flowers."
"Alright, if you say so. Here is your reward, and your bonus for the additional flowers." I took my reward and returned to the inn.