Old Stickfingers

The X here does double duty in a way most X spells don't: it isn't buying a bigger body directly, it's setting how deep you dig for creatures to bin. Pay more, mill harder, fill the graveyard, and only then does the body catch up, because the power and toughness read off the yard rather than the mana you spent. That split is the whole trick. A conventional X finisher gets flimsy when you cast it cheap; this one can arrive as a modest creature and still leave a graveyard stocked with fuel for whatever wants creatures in it: reanimation targets, delirium counts, sacrifice fodder, escape costs. The friction is randomness. You reveal until you hit X creatures, so a creature-light deck can plow through a fifth of its library to fill an order, and everything nonrelevant goes to the bottom in an order you don't control, punishing anyone hoping to sculpt draws. That makes it a self-mill engine wearing a beater's clothes, and the beater is almost the least interesting part. It rewards decks that treat the graveyard as a resource pool and want a single card that both stocks the pool and turns into a threat if nothing else does. Cast for one, it's a cantrip-adjacent digger with a body attached; cast for four or five, it's a graveyard's worth of value stapled to a creature whose size you already know before it resolves.