Dwarven Pony

A perfect artifact of design-by-tribe before the tribe existed. The ability grants mountainwalk to Dwarf creatures, a payoff for a creature type that the set it came from barely supported and that the game spent the next decade-plus ignoring. Mountainwalk is the narrowest of evasion abilities: it does nothing unless the defender controls a Mountain, so the effect is hostage to the opponent's manabase rather than your own gameplan. That conditional makes it a red-mirror tool above all, since the deck most likely to be flooding the board with Mountains is the one wearing the same color you are. But pile the conditions up: a one-power body, two mana and a tap to activate it once per turn, and a target that has to share a near-nonexistent creature type, and you get a chain of restrictions where each link assumes a board state the others undermine. This is an attempt to seed a Dwarf aggro archetype, the kind of lord-and-enabler tribal structure later sets would build on purpose, except the enabler arrived with no lords, no critical mass of Dwarves, and an evasion ability that only matters in a matchup the enabler itself does nothing to help you win. It survives as a fossil: proof that the instinct to reward narrow creature types predates the deck-construction tools that make narrow creature types worth rewarding.