The most valuable cards include 1st Edition Base Set holographics (especially Charizard), Shadowless prints, Gold Star Pokemon, Illustrator Pikachu, Trophy cards, Japanese exclusive promos, and modern chase cards like Alt Art and Rainbow Rares from recent sets
In particular, theres this fine fellow: This legendary creature has a lot going on
Another major source is the Illumineers Quest series, such as Deep Trouble or Palace Heist, which introduces oversized scenario cards or boss characters like Ursula and Jafar
Then pay the two generic mana to trigger Isochron Scepter and cast a copy of Final Fortune
Plus this compilation contains 65 Gyarados-themed card sleeves depicting the beast as its best
Bidoof Ability: Carefree Countenance As long as this Pokmon is on your Bench, prevent all damage done to this Pokmon by attacks (both yours and your opponents)