Before the bans, Heartfire Hero was arguably one of the best 1-drops in the format because it's a 1/1 creature with Valiant, meaning it gets +1/+1 counters easily, and then deals damage equal to its power to all opponents on death
If theres a cost associated with having each of those creatures block, its controller isnt forced to pay the cost, so they dont have to block in that case either
This looks even better in the secret rare printing done for the 2008 card tins, where the shiny secret rare effect really amps up that star effect
Because of the Extra Deck Fiend xenolocking imposed by "EvilTwin" monsters, most of these external synergies involve Main Deck or Fiend support, or must complete their non-Fiend Extra Deck plays before going into the "EvilTwin" Extra Deck plays
(This was his actual theory.) Some psychologists say collecting gives us a sense of control and identity in a chaotic world