Playing against secret palidan more, I'm starting to realize a lot of the game often comes down to whether or not the avenge goes to the Mysterious Challenger, or if it goes to one of the random other minions left over on board.
Partly thanks to it being out of BGH range otherwise, and partly because you're not able to combo that 3/2 into a single hex/polymorph/shadow word death. And it's not like it's easy to keep their board clean to avoid that either, with Muster for Battle, Haunted Creeper, Shielded Minibots, Piloted Shredder, Coghammer, and Truesilver Champion all so good at owning board presence.
It's kindof like Huffer in face hunter. When you're playing such a fast deck that extra 3 or 4 damage is huge.