Llanowar Druid

Burst ramp built on a peculiar accounting trick: it does not produce mana, it refunds it. Untapping all Forests turns a board of already-spent lands back into available mana, so the value scales with how many Forests you have tapped and how badly you need them again before the turn ends. The sacrifice clause is what holds the whole thing in check: this is one-shot acceleration that costs you a body, not a repeatable engine. Where Llanowar Elves and its kin commit to the board and pay you back across many turns, this inverts the philosophy into a single explosive untap that wants you to spend everything, throw the Druid away for a second wind of Forest mana, and convert that surplus into something the same turn. The card documents an early green experiment with untap-as-mana rather than the tap-for-mana template that became the color's default, and the awkwardness of that approach (you need the Forests, you need them tapped, you need a payoff worth the body) is precisely why the cleaner mana-dork model won out. It reads as a record of a road green did not take, an untap-based acceleration idea that sits strangely next to the dorks printed before and after it.