Krosan Beast

Four mana buys a 1/1, until your graveyard reaches seven cards and that body jumps to an 8/8. The gap between those two states is the entire pitch: this is threshold in its loudest form, a switch with nothing in between. Before the count is met, it sits as a blank the opponent can ignore and you cannot profitably cast; once it flips, it is a one-card clock that outclasses nearly anything in its mana range. What makes it a pure statement of the mechanic is how little it contributes to its own enabling. It does not mill, draw, or sacrifice; it simply waits for the cantrips, flashback spells, and early creatures whose deaths stock the yard to do the digging. That dependence is the cost the design charges for the payoff: the bigger the threshold reward, the more passive the card that collects it. It is also the vulnerability. A single graveyard-hate effect knocks it back to a 1/1, and a removal spell at the wrong moment trades up enormously against a turn of careful setup. The body is almost a placeholder for the number it wants to become, which is the point of building this much variance into one creature: the mechanic was willing to hand a deck a game-ending threat, provided the deck proved its commitment to feeding the graveyard first.