Something Worth Saving

It can filter toward lands or permanent payoffs while stocking the graveyard, but it neither ramps nor affects the board and is far less efficient than Standard's best cheap selection.

Could be wrong if Unrevealed graveyard or land-recursion payoffs could turn the four-card mill from minor selection into meaningful engine support.

Greasefang shells can use four cards of self-mill and occasionally retain another permanent, but this is slower and less reliable than dedicated graveyard enablers.

Could be wrong if Its value rises if existing Greasefang lists need both selective digging and an additional self-mill effect at this mana cost.

Instant Reanimator can exploit the mill, but two mana to mill four with only conditional card neutrality is below Modern's usual graveyard-enabler rate.

Could be wrong if A resilient reanimation shell that values holding up interaction before end-step setup could make the instant timing matter more.

Lands can value graveyard stocking and permanent selection, but Legacy's cheap cantrips and specialized graveyard tools leave little room for this modest effect.

Could be wrong if A permanent-heavy green graveyard list with a specific need for instant-speed self-mill could provide a narrow home.

At common, milling four while replacing itself with a permanent is plausible graveyard support, but it is slow and does not directly advance the board.

Could be wrong if Its adoption depends on whether a competitive green graveyard shell values this selection more than existing landcycling and self-mill options.

Permanent-dense recursion decks get cheap instant-speed selection plus four cards of fuel, though the spell is replaceable and weak outside that plan.

Could be wrong if Its score falls if optimized lists prefer direct tutors, recursion, or self-mill that produces more immediate card advantage.

Most Limited decks have enough lands and creatures for reliable card-neutral selection, and the mill has upside with revealed graveyard themes, though it lacks board impact.

Could be wrong if Unknown draft speed, permanent density, and graveyard payoffs could make this either strong smoothing or merely slow filler.