Source: sites.google.com

1. Underworld Unleashed

Demons!!

This one starts with a mysterious figure named Neron as he calls up a TON of D through F-List villains and brings them to an underground cavern filled with green fire. He tells them that he can seriously upgrade them into superbadasses if they will only do one thing: Sell him their souls. A bunch of these villains decide that there’s absolutely no way whatsoever that this could go bad in any serious way, and they sign right up!

In the tie-ins, various DC Comics heroes find themselves menaced by upgraded versions of their least-threatening villains. In the main series, Neron puts his plan into action to get the “purest soul in the DC Universe” (who that is winds up being a pretty clever twist that I’m not gonna spoil here).

However, the protagonist of the mini actually winds up being Flash villain The Trickster, who is the only one Neron trusts as his apprentice.

Lasting impact: Neron sticks around for a while, a lot of the changed villains stay upgraded, and Blue Devil is turned into an actual demon in this book, which has become an enduring part of the character.

And there you go, the best event comics people have by and large forgotten about. Go track one of them down! Even if it’s not reprinted, digging through back-issue bins looking for all the tie-ins is half the fun!!