Mutavault

The promise of the manland is that it taxes your opponent's removal without taxing your mana: a land that does nothing until you need it to attack, then dodges the sorcery-speed sweepers and creature-only answers that punish actual threats. Colorless mana is the price it pays. It produces only generic colorless, so it slots cleanly into aggressive two-color decks that can stomach a land that doesn't fix, and the activation cost is cheap enough that it threatens to attack on a board that looks empty. The "all creature types" clause is the quiet wrinkle that has carried it through tribal era after tribal era: it counts as a Goblin to one anthem, an Elf to another, a Merfolk lord's pump target, a valid sacrifice for a tribal payoff, all without committing a real card to the board. That flexibility puts it ahead of the manlands that came after, most of which produce colored mana but answer to a single tribe or none. A 2/2 with no evasion is a modest clock, but the point was never the clock; it was that a deck could keep grinding through a board wipe because one of its threats was hiding in the mana base. The manland archetype has been refined many times since, but the version that asks for nothing but a colorless source and a single mana to wake up remains the template the others are measured against.