Dragonite's powerful attacks and friendly design make it a very sought-after card
We do know some of the retro frame cards, like Snapcaster, Liliana of the Veil, or Meathook, and sadly, I dont think that these are going to be particularly chase versions
This will guarantee you another card and give you face-up creatures to attack or block
The card was errata'd in 2017 (a massive 15 years after the card was first printed) with the introduction of Link Monsters to the game, but prior to then, the effect of Darkness Approaches was to flip a monster face-down without changing its battle position
Any card can be discarded as well, so if you have Energy recovery you can discard a Fire Energy, add two then recycle the discarded card