Nosy Goblin

When a block format leaned hard on morph, it raised a policing problem: how do you fight a 2/2 of unknown identity without knowing what it is? This is one answer, a dedicated morph hoser whose only job is to strip the disguise before it can pay off. The targeting clause is the whole point, because it cannot touch anything already turned face up. The activation pressures the morph precisely when it is most threatening: when its controller is holding mana to unmorph in response to combat or removal. But that timing cuts both ways. A player can flip a morph face up whenever they hold priority, including in answer to this Goblin's sacrifice. If the opponent has the mana to do so, the target is no longer face-down and the ability fizzles, leaving you down a 2/1 and a kill spell. So the card is less a guaranteed assassination than a mana tax and a bluff-caller: it forces the morph player to either commit mana to save the creature or lose it unflipped. A 2/1 Goblin that sacrifices itself for a conditional single kill is a narrow rate by any general measure, and it was never built to be general. It is a designed-in counter to a designed-in mechanic, the kind of pointed hate that becomes dead weight the moment morph leaves the table.