Eerie Gravestone

Colorless enters, black activates: the split is the whole design. Any deck can run this as a two-mana cantrip that replaces itself the moment it lands, but the sacrifice ability behind a black pip is what turns a mundane artifact into a graveyard-fueled creature finder. The activated ability mills four and lets you pull a creature from among those cards into your hand; paying and sacrificing the artifact is the actual price, which reframes self-mill as construction rather than accident. You feed the yard while you sift it, and the creature you find comes to hand rather than the battlefield, keeping the reload honest. Because the artifact draws when it enters, it never costs you a card even if you hold it, so the sacrifice becomes a patient second use rather than a bill you have to settle. That two-stage shape (a two-mana cantrip now, a colored payoff later) is the reason a card this cheap can serve two masters at once, threading the gap between colorless enablers that fill graveyards blindly and dedicated black tutors that cost more and touch nothing else. The four-card mill and the creature-only clause keep the payoff narrow enough that it reads as an aristocrats or reanimator engine piece rather than a general-purpose selection spell.