special edition mew pokemon card limited Card Mew (Holographic) but the card can still be sleeve playable Pokemon - Mew Promo #8

One of my favorite multiplayer planeswalkers of all time is Sarkhan Vol for his +1 to haste and +1/+1 your team

It was so good it was quickly banned, and remains to this day illegal in Modern and Legacy

Historically, Cabal Therapy has paired with other discard spells and Gitaxian Probe so you have a better chance of getting a look at the opponents hand before casting it, but for Cabal Therapist thats another layer of setup and another deckbuidling restriction for a card that clearly wants to be paired with a high density of creatures or token generators so you can fuel the ability turn after turn to force your opponent to spew their spells quickly or lose them

Lastly, we want cards where the earliest version has unique art if possible

Pikachu ex is currently worth around $458, which just barely surpasses Team Rocket's Mewtwo ex