Nahiri's Lithoforming

The tension every "sacrifice lands for value" card has to resolve is that lands are your least expendable resource, and this one answers by handing them straight back: the same X that fuels the card draw refunds itself as extra land drops. So the sacrifice is not a cost so much as a conversion, spent permanents into cards into a rebuilt board, all in a single turn. The trap is the tapped clause. Everything you play this turn, the lands you sacrificed into and the fresh ones you drop after, enters tapped, which locks the payoff a turn behind the outlay and stops the card from being a one-turn ramp-into-kill engine on its face. That delay pushes it toward rebuilding rather than bursting: you empty your board on the mana you already have, refill your hand, and reload your lands for next turn rather than this one. It rewards decks stacked with enters-tapped-anyway lands or land-death triggers, where the drawback is already priced in and the extra plays turn dead lands into cards. Read straight, it is a symmetrical-looking card with a very asymmetrical best case: the more lands you are willing to feed it, the more the draw and the replays compound, right up against a timing wall that keeps the whole thing from being free.