Most of these abilities only occur when the case enters the battlefield, but they can also be triggered in other ways, such as Case of the Pilfered Proof, which has a triggered ability that adds a +1/+1 counter to your Detectives whenever they enter the battlefield under your control
Large Creatures Other cards were the reverse
Some key words aren't part of the revelation effect, currently including Hidden (though it has little effect on its own), Peril (you can't cancel another player's treachery with this keyword, though this is more a Ward of Protection (2) problem) and Surge - yep, you're still drawing another treachery, even if you cancel this one
Pricing these types of cards is really tricky too, so you end up in a situation where you dont know what the price of something should be - and it is going to take maybe months to find a buyer who can tell you what that price is
, : Target Zombie creature gets +2/+2 and has fear for as long as this creature remains tapped
It would have been nice to be able to undo certain moves in single-player, as Id often find myself accidentally setting a monster instead of summoning which would essentially waste my turn
