You CAN Play Type I #62: Opening Up Onslaught, Part III – The Sorceries
Blackmail is clearly a second-rate Duress. But is that bad? Well, actually it is – unless you can find a deck that wants four more discard slots. You know, though, that no deck wants all that discard, the simplest reason being it sucks to strip an empty hand while a weenie beats down on you. Discard is just disruption; you need other things to win you the game.