Famished Worldsire

Devour usually eats creatures; here it eats lands, and that swap is the whole design conceit. The 0/0 body is a placeholder that only becomes a threat by feeding it your own mana base, three counters per land sacrificed, a steeper conversion rate than most devour cards ever offered. But the elegance is in the loop it closes: the enter-the-battlefield trigger digs a number of cards equal to its power and drops any lands it finds straight onto the battlefield tapped, so the lands you sacrificed to grow it are partially refunded by the very size that sacrifice bought. Feed it more, it gets bigger, and a bigger power digs deeper for replacement lands. The Ward tax protects the investment from the single removal spell that would otherwise punish sinking half a mana base into one creature. Fatties built from your own resources have always shared one weakness: they leave you tapped out and vulnerable if they die. This design chips away at that by making the sacrifice self-mitigating and the result hard to kill on the cheap, so committing your lands is less of a one-way door than devour normally makes it. The catch is that the refund hinges on what the top of your library holds, so the card rewards a deck stuffed with lands rather than one that happens to run a few.