Aisling Leprechaun
A Legends oddity that reads like a design experiment nobody quite repeated: combat as a color-changing event. The mechanic is doing something genuinely strange for its era, which is treating "green" as a property you can apply to an opponent's creature, indefinitely, just by stepping into the combat step with it. The obvious read is protection-from-green enablement, and that is the corner of the design the card occupies: a one-mana body whose job is to paint a target so that your protection-from-green attacker or your green color-hoser of choice suddenly has a handle on a creature that previously dodged it. The cost of the effect is the combat itself, which means the leprechaun is usually trading down or chump-blocking to land the color change, and the change persists past its death. That permanence is the part that has aged into curiosity rather than power: modern design has almost entirely abandoned indefinite, board-state-altering riders on vanilla-statted commons, because the bookkeeping is hostile and the payoff is narrow. The card survives as a artifact of a moment when Magic was still willing to print a one-drop whose entire reason to exist was enabling another card you also had to draw.
