Ornery Goblin

A 2/1 whose extra point of damage sounds minor until you trace what it actually buys. A 2-power body already kills the X/2s it fights; the trigger extends that reach up one, so it trades with X/3s (one damage in the declare-blockers step, then two more in combat) that would otherwise survive. The wrinkle is that the ping fires on both halves of the combat assignment: when it blocks and when it gets blocked, so it punishes an opponent for stepping in front of it as readily as it punishes something thrown in its path on the other side. That makes it a deterrent as much as an attacker, the kind of creature a defender would rather wave through than eat. Call it deathtouch-lite without the keyword: a small repeatable jolt stapled to the combat step, asking the opposing creature to be tougher than it looks before it commits to the fight. Plainly built common-rarity aggression for a Goblin curve, doing its work across the first few turns and rarely mattering after.