Nice series, I remember seeing these cards in the Crucible and I'm pretty sure I voted for the ones I saw.
The problem I had with flame, iirc, was that it was basically like poison, it was pretty hard to stop (being fire-cost rather than random-cost, is not affected by purify), along with all those other good stuff from nightmare (draw lock, etc.)
Anyways, since I recognize this series, there's no doubt that these cards inspired my own slew of nightmare buffs ^^
Thanks for the comment on my series thread!