Thought Devourer

Four power, four toughness, evasion, and a price paid not in mana but in the architecture of your turns: your maximum hand size drops to three cards. That permanent reduction in hand size reads like a tax until you place the creature in the block it was built for, a block that taught players to empty their hands and fill their bins so that threshold could pay them back. A flyer punishing you for hoarding wants to be cast onto a board you are already developing aggressively, where surplus cards are liabilities you would pitch anyway. The clever turn is that the clause is not passive: end-of-turn cleanup becomes a forced discard outlet whenever you're holding more than three, a fuel line that can feed the bin and convert an apparent downside into engine input for the strategy around it. Read alone, this is a beater with a glaring penalty; read inside its intended shell, the penalty is the point of contact between the body and the plan. The body is generous for an early-era four-drop (a hard-to-block threat that ends games quickly), and the hand-size clause is the lever keeping that rate from being free. It only makes sense alongside a graveyard-fueling deck, which is exactly the kind of deck this design assumes you are already trying to build.