pokemon silvally gx card GX is Knocked Out Silvally GX 227/236 Cosmic Eclipse

It feels for this reason like Skullclamp shouldn't be on the list but with the abundance of creatures and the effectiveness of the draw it can be used as an engine or as just a card draw effect in more decks than are able to use many of the cards on this list

These cards were all the very first promo cards available for purchase in a collectors' set over a year before The First Chapter's launch

Mega Lucario ex F - Aura Jab 130 Attach up to 3 Basic Fighting Energy cards from your discard pile to your Benched Pokmon in any way you like

Steam Siege has 116 cards in total (114 main set cards plus 2 Secret Rares)

Still, energy in general feels fairly fringe because it doesn't really play well with anything else