Deathmask Nezumi

Most aggressive creatures reward you for emptying your hand; this Rat does the opposite, switching on only while you hold seven or more cards. Meet that count and the static ability turns a plain 2/2 body into a 4/3 with fear, an evasive clock that slips past everything but artifact and black blockers. The self-correcting logic is in how the bonus and the act of using your resources sit on the same axis: spend cards to develop your board and the buff evaporates, leaving you a body that has accomplished nothing with its turn. That puts the card in direct opposition to the threshold and hellbent designs of its era, which pay off as the hand drains; here the incentive runs the other way, asking you to draw deep and keep drawing so that seven-plus is a resting state rather than a lucky opening grip. The strategic pull is toward decks that refill faster than they spend, where the evasive body is a side benefit of card advantage you wanted anyway. Left to its own logic it is a creature that turns off the moment you try to cash in your resources, a self-limiting tension that keeps an evasive 4/3 at this cost from being a free aggressive threat.