Volley Veteran

What four mana buys here is a Goblin-count removal spell stapled to a body, and the body counts itself the moment it arrives: the enters trigger reads your board with the new Goblin already included, so a battlefield with a few one-drops down turns it into Lightning Bolt or better pointed at a single opposing blocker. The math scales in exactly the direction a Goblin deck already wants to grow. The restrictions are deliberate. Damage can only go at something an opponent controls, so this never doubles as reach to the face or a way to clear your own creature off a stalled board. The trigger fires only on entry, so there is no repeatable burn engine, just one shot priced to the state of your battlefield when it lands. And the 2 toughness means it folds to the same cheap removal it is built to outrace, which keeps it from snowballing unchecked. It belongs to a long line of go-wide tribal payoffs that reward committing bodies before they reward committing power: the more Goblins you have out, the better the rate. The floor is not nothing, though. Cast into an otherwise empty board it still deals 1 to a lone opposing creature (the count is one, itself), so you get a 4/2 and a small ping rather than a blank. That conditional ceiling is the whole pitch: deploy it onto a developed board and you have cleared a blocker for free.