For years, people wanted Charizard to be a Dragon
If a suspected creature loses all abilities, it will lose menace and "This creature can't block," but it won't stop being suspected
Open them all at once for a skyscraper-sized haul, or save them for when the city calls
Even if using learn as a discard-draw rummage is always a bad rate, compare Professor of Symbology versus Fissure Wizard
Another top contender is Orzhov (white/black) Greasefang, a combo deck that aims to cheat a massive vehicle like Parhelion II onto the battlefield with Greasefang, Okiba Boss for a potential turn-three knockout
Its passive ability is fine and can be useful in sacrifice-centric decks, but its the second ability that both gives this card points and takes them away