Benalish Emissary

Stone Rain stapled to a wall: that is the bargain this card offers, and it is a cleaner illustration of kicker's design intent than most of its early-era cycle. Unkicked, you get a defensive 1/4 body that blocks two-power attackers all day and walls early aggression for white at a fair price. Kicked into green, you spend the extra mana to blow up a land the moment the creature lands, then leave the wall behind to keep absorbing attacks. The keyword's whole purpose was to let a single card scale from filler to relevant without dead draws, and the split here is unusually honest: the floor is a playable defensive creature rather than a vanilla, and the ceiling is a real tempo swing that punishes greedy manabases. The green half also encodes a multicolor thesis without printing a gold card, since the destroy-target-land rider lives in green's color pie, not white's: paying the kicker is what unlocks the second color's effect rather than splashing for it on the type line. It is the rare kicker creature where both halves are things you actually want at different points in a game, which is exactly the lesson the mechanic was built to teach.