Henge Guardian

A colorless beater built for decks that ran no spell of any particular color: a five-mana artifact body any mana base could cast, with a repeatable trample grant tucked into a activation so it could push damage past chump blockers without help from the board. That self-sufficiency was the whole pitch in an era when colorless finishers were thin and a 3/4 that could make its own combat math matter looked reasonable. The Dragon Wurm type line is the curiosity that has outlived the card's playability: a hybrid creature type that exists almost nowhere else, a flavor seam stitched between two of the game's most iconic monster classes and bolted onto a workmanlike colorless frame. The trample ability is a switch, not a dial: it grants the keyword until end of turn and nothing more, so paying twice in a turn buys you nothing the first activation didn't, and the body still connects for three. That made the rate (two mana per turn just to stop getting chumped) slow even against the dedicated aggressive creatures it shared a format with. As a piece of deckbuilding convenience it asked nothing of your colors and returned a mana-hungry evasion toggle in exchange. The design idea, a fixing-agnostic beater with a built-in answer to ground stalls, has been executed far more efficiently since, but few of those successors wear a type line this strange.