They are often the backbone of many decks
Speaking of most cards, the only teased Pokmon without any fancy tricks is the still-threatening Archeops
Quick one here, prices for these should be the lowest within the first week of the release
Feast of Sanity Feast of Sanity doesn't look like much on its own, but in decks all about discarding cards -- Wheel and Madness -- it can be a powerful removal / finisher that keeps you alive while wiping everything out
Admittedly, just about anything that involves March of the Multitudes before Chapter 3 hits effectively ends the game
Some careful deckbuilding is needed, but tutoring for a one-drop creature, enchantment or artifact is an incredibly flexible ability, and can generally find the perfect silver bullet so long as you include it