Hello! I love this story so much! It is absolutely amazing and I like it because it is canon compliant.
You described Sirius so wonderfully! It was amazing! The way he was so distraught. It was so heartbraking for me because Sirius is one of my favorite characters. Moody was awesome! Dumbledore was great! The way he was so cold and stern was sorta unnerving! You stuck in character which was great. It wasn't out of character in any way. Great job with that.
The theme, Verutaserum, was perfectly used. It was a main component in the story. The prompt, Sirius, was obviously awesome. Dungeon was perfect also because it wqas set in the dungeon. TRagedy also. And not just to Sirius either. You really made it feel like Severus and Dumbledore and Moody were all grieving. That's why they were so sad and angry.
It was so creative. I would never have thought of this and the way its left on a bit of a cliffhanger (even though we know what happens) is great. I don't know what more I can say, other than its amazing and awesome! definietly a favorite of mine. Bye!
From fellow competitor in the IWSC and writer, NinjaDevil2000

This was pretty good. No idea why Dumbledore would call Voldemort by a moniker he frequently disparaged, but this is otherwise a good, surprisingly original short story.

This was amazing! I am going to go read all of the other one-shots!