Necratog
The Atog mechanic has always traded on self-consumption: feed the creature something you own to make it bigger, and the question is always what you can afford to lose. The original Atog ate artifacts, Chronatog ate turns, Auratog ate enchantments. This one eats your own dead, and the fine print is where the design tension lives. The pump exiles the top creature card of your graveyard, not any creature you please, so the order in which your creatures hit the bin dictates which ones you can spend. You cannot reach past a fresh corpse to grab the cheap fodder underneath; the most recently buried creature is the one you feed it. That ordering constraint is what keeps the +2/+2 honest alongside the stocking cost: each activation permanently spends one creature from your own yard, so the threat scales with how readily you can refill the graveyard rather than how much mana you pour into it. The mana-free pump is resource-gated rather than mana-gated, the inverse of how most pump creatures are priced, and the fuel comes strictly from your own graveyard, never an opponent's, so it does nothing to hate out their recursion. The body sits awkwardly with the aggression its color suggests and slots more naturally into a deck already churning creatures through the yard, where exiling the top of the pile grows the threat while quietly stripping your own reanimation targets out of reach.

