The pacing of this piece was excellent; you managed to fit a lot of action, dialogue, and detail into a comparatively short flash fiction story. The twist at the end was also unexpected and really entertaining.

It's a little unclear how Keck was attacked by a harpy. Earlier in the story it's just mentioned that Keck is "shoved into a dark doorway" but it's unclear whether they're inside, outside, whether the door is open, etc. Because of that confusion, the "pain exploding from his abdomen" and "from above there came the beating of dark wings" felt a little out of place since we don't have a clear sense of geography and where the characters are currently standing.

Other than that minor descriptive issue, I thought this flash fiction story, as a whole, was a very entertaining and well-told story. Nice job!