The ball is in the designers court, but I believe that Gardevoir ex could have the potential to be both a powerhouse and a healthy deck for the format
Just play enough creatures to keep the pressure on your opponent
Magic has a large secondary market, and some cards have held or gained significant value over time
Night Of The Undead: Skull Servants Deck Skull Servant is quite an old card in Yu-Gi-Oh
One more Gandalf is likely to appear, given Dmitry Burmaks teased artwork titled Gandalf, Friend of the Shire, but we know for sure that Gandalf the Grey can pop up bearing Tales of Middle-earths showcase frame treatment
For the card elements themselves, I typically only need the following: card templates (blanks) actual Pokmon TCG card backgrounds, with the text and symbols removed card icons energy symbols, set icons, special Pokmon type symbols (EX, Lv.X, Mega, etc), card badges, etc fonts at the very least Gill Sans for mostly every piece of game text, Futura for HP text, and Optima for Flavor text (on modern cards)