These early cards were focused more on what made for an entertaining story, and the anime was more than happy to create new rules as it went along in order to justify itself
New secret rare cards were also revealed from the set
Turtles Forever The getting a card from outside the game aspect doesn't come into play in Commander, but getting two of four of your choices is pretty good stuff from Turtles Forever
Fogs that cost a lot of mana and fail to prevent damage are generally really, really hard to justify taking out of a sideboard, even if they provide Scry 2 to offset their card disadvantage
If you choose the "Distract" mode of Stone Drake's second ability and the target is illegal when the ability tries to resolve, it won't resolve and none of its effects will happen
Professor's Research If you've been collecting Pokemon cards for the last several years, you'll know that they love their full-art trainer cards and they are some of the most popular with fans