Roving Keep

The manland-in-reverse. Where creature lands stay lands until you pay to animate them, this is a defensive wall that pays to become an offensive threat: a 5/7 blocker that, when the ground is stalled and you have mana to burn, unlocks its defender to swing as a 7/7 trampler. The steep activation is what keeps the mode honest, since it demands a full turn's investment on top of the seven you spent to cast it, so the card sits at the top of a curve as a game-ender for decks that want to grind through a stalemate rather than race. The trample matters more than the power bump: it turns the wall from a body that trades into chumps into one that closes games through them, and it keeps the ability relevant late when opposing blockers pile up. The tension in the design is the whole appeal: a card that is genuinely two things at once, a defensive anchor most of the game and a finisher on the turn you decide the stall has gone on long enough, without ever needing a second card to switch modes.