Ancient Greenwarden

The doubling clause is the whole design payload here, and it reads more carefully than it looks. Green already had a card that doubled landfall triggers in Retreat-style effects, but this collapses the recursion engine and the multiplier into one body: the second ability lets you replay fetched or sacrificed lands from the graveyard, and the third turns every one of those replays into a double landfall event. Play a land, get the trigger twice. Replay a land you already used, get it twice again. The two abilities are built to feed each other, which is why the card wants a deck stacked with landfall permanents rather than just a lot of lands. Crucially, the multiplier is written to trigger any land-entry landfall an additional time, not just yours from graveyard, so any fetch, any extra-land-drop effect, any bounce-and-replay line scales through it. The 5/7 with reach is not decoration: at six mana this needs to survive the turn it lands, and a seven-toughness wall that blocks flyers is hard to trade down profitably, buying the extra turn the engine needs to run away with a game. It sits at the top of the green landfall curve as the payoff the archetype had been waiting for, the piece that turns a pile of incidental landfall triggers into a lethal loop rather than incidental value.