Baloth Pup

Two mana for a 3/1 buys you a fast clock with an obvious problem: a single point of toughness means it dies to anything, and trades down into any blocker it can't kill. The support clause is built to fix exactly that. Put a +1/+1 counter on it and it becomes a 4/2 trampler, turning the body that used to bounce off a 0/1 into one that punches damage through it. This is a creature designed to be a counter's beneficiary rather than its own engine: it does nothing special on its own, and it asks the deck around it to supply the buff that switches trample on. The reward is that the counter does double work, adding both the stat the toughness desperately needs and the evasion that makes the new size matter. It reads as filler until you remember how many green decks were stacking +1/+1 counters in its era, at which point a two-drop that converts each of those counters into trample becomes a quietly efficient finisher rather than a glass-cannon beater that gets chump-blocked forever.