King Suleiman ($161) King Suleiman was probably quite good when it was first printed, and djinn/efreets were more common to see, but these days its just pure nostalgia (and Reserved List, obviously!)
Be proactive in resolving any issues
Wildfire Eternal Wildfire Eternal is supposed to present a damned if you do, damned if you dont scenario for your opponent, but its high enough on the curve that your opponent is just likely to have a way to stop it
It is essential for Electric decks, and nowadays costs around US$19
They convert arbitrary storm counts into damage, which usually wins more reliably than something like Brain Freeze or Ignite Memories
Honorable Mentions Before we get to the main countdown, a handful of cards deserve a nod for sitting just outside the top 10