rare cubone card Pokemon - 104/165 - Pokemon 151 - Reverse Foil Japanese Cubone Card Flying Pikachu

Its kind of one-mana instant-speed removal for decks that dont go very wide, but its also a way to protect your creature from a board wipe or tap a summoning sick creature

Corpse Augur [Wizard]: There has to be one player at the table who will give you X of four or five

Its got some Legacy applications as well, but its mostly a Commander card that seems quite difficult to reprint

Collector Boosters almost always have higher EV than Play Boosters due to foil premiums and guaranteed rares, but the absolute price per pack is 34 higher

I even ruled out cards like Horn of Greed that provide means to draw many cards but don't do it on their own