Tarmogoyf

A creature whose stats live in the graveyard rather than on the card: power and toughness scale with the number of card types accumulated across every yard, so the body grows as the game generates corpses, burned-out instants, cracked artifacts, and discarded sorceries. This was the design that proved a two-mana creature could be the best body in a format without a single keyword or activated ability attached to it. The genius is in the friction it requires of both sides: the /1+ line means it starts small (an empty graveyard leaves it a 0/1), so the card asks its pilot to seed the yard and forces opponents to fight a clock that ticks up on its own. Five card types across the graveyards make it a 5/6 for two mana, a rate no fair removal price was ever set against. The toughness always sitting one ahead of power is the quiet load-bearing piece: it dodges symmetric damage-based sweepers that would otherwise trade with a creature its own size, and it survives the very burn spells aggressive decks lean on. It defined what "efficient green beater" meant for a generation of constructed play, and the long parade of attempts to recapture it (creatures keyed to graveyard counts, to delve, to spells cast) all measure themselves against the original.