Glowspore Shaman

The self-mill payoff and the self-mill cost living in the same two-mana body. Milling three cards is risk in most decks and fuel in a few, and the design splits the difference cleanly: the optional clause lets you put any land from your graveyard on top of your library, whether it just got milled, was already sitting there from an earlier turn, or arrived via a cracked fetchland. That two-step is the tell for what this Elf is built around. It feeds a graveyard worth caring about (delve, flashback, reanimation, escape) while smoothing the manabase so the mill never costs you a land drop, and the 3/1 means it can trade into something or chip for damage rather than standing around as a pure engine piece. The fragile toughness is the price: it dies to almost any incidental damage, so the value is front-loaded into the enters trigger, and the body is a bonus you're not meant to lean on. Golgari and Sultai graveyard strategies have long wanted a cheap creature that does exactly this (load the yard and fix the top of the deck) inside a single card, since most enablers handle only one half of the job and leave the other to a separate slot.