B Pseudanonymous Phillip York got into Magic with the release of Alpha, successfully trading a Mint/Near Mint alpha Black Lotus for 4 Giant Growths and 2 Craw Wurms (those were Alpha too, at least), has been in and out of Magic 3 times, gone through a number of full dual land sets, is a former level 2 judge and Wizards of the Coast Employee, and formerly serious but actually pretty serious because sponsored by a game store, competitive player
Special Summon 1 Level 4 or lower "Dragonmaid" monster from your hand
Even something as simple as a Leechridden SwampLeechridden Swamp activation will get you a counter
The rest of the cards listed below are top-tier as well
cards that can feasibly be used and then be the only card - or one of a few - in a player's graveyard under common circumstances for the era
They can also turn the tables against foes who they should not normally be able to stand up to with specific move effects that target a particular card type