Elven Riders

Evasion-as-creature-text was a rare design tool in the early years, and this is a remarkably clean expression of it: a 3/3 body whose only printed text narrows the universe of legal blockers to two specific buckets. The choice of Walls and fliers as the exception list is the giveaway about the era's defensive vocabulary. Walls were the default ground-stopper of the period (defender as a keyword did not yet exist; the Wall creature type carried the "cannot attack" clause in the rules themselves), and flying was already the universal evasion answer. So the card is really saying: anything that was not purpose-built to block you cannot. The five-mana cost for a 3/3 is the tax green paid for near-unconditional evasion before trample, landwalk variants, and shadow had been fully sorted into their color slots. This is the moment green was allowed to put a creature past the ground without leaning on forestwalk or trample math: an early ancestor of the long line of "cannot be blocked except by" creatures that would eventually be priced far more aggressively, from Silhana Ledgewalker to Slippery Bogle. The blockers list dates the card; the design instinct behind it does not.