Fallen Cleric

Protection from Clerics is a hate-ability so narrow it only makes structural sense in a tribal-saturated environment, and the era that produced this design was built around exactly that: every creature type carried strategic weight, and Clerics were a defined archetype of lifegain payoffs and recurring blockers. Read the protection clause precisely, though, because the text is doing less than it looks. It means Cleric creatures cannot block this body, cannot deal damage to it, and cannot target it with their abilities; it does not interfere with a removal spell or combat trick merely because that spell happens to point at a Cleric. The protection cares about what the source is, not what the spell is aimed at. So the 4/2 walks through a wall of Cleric chumps and shrugs off a Cleric's tap-down or shrink effect, while a generic Terror kills it the same as anything else. The whole evaluation swings on the opposing board: a wrecking ball against a deck thick with one subtype, an overpriced body against a deck without it. Morph is the relief valve for that variance. The card can hit the table concealed and undersized when you simply need a blocker, then unmorph for at the moment the protection text suddenly matters, keeping the answer hidden until it lands. Even in matchups where the protection clause is dead, the card is not blank: the face-down body and the unmorph bluff still give it a floor a true vanilla creature would lack.