Memorial to War

The Memorial cycle traded raw efficiency for an attached sacrifice clause, and this is the one that turned a tapland into a late-game Stone Rain. The deal is plain: you accept an enters-tapped land that taps for a single color, and in exchange the land carries a five-mana land-destruction button you can fire once the early turns are behind you. That framing matters because the spent activation costs you the land itself, so the destroy effect is genuinely a sacrifice of a mana source, not a free rider. Land destruction has rarely been a winning strategy on its own, but stapling one copy of it onto a land that was going to sit in the deck anyway sidesteps the usual cost of running Stone Rain effects: the card slot. You are not diluting your spell suite to attack manabases; the attack lives in the land slot and only activates when you have mana to spare. The price is steep enough that it never threatens to dominate, and the tapped clause keeps it honest against decks that want the colored mana on curve. It is a piece of design about deferred optionality: most games it is a slow red source, and in the games that grind long enough to need it, it becomes a way to deny an opponent a key land without spending a card to do so.