Thats a very handy ability to have, considering how many strong cards there are in Ruby that can help you achieve that aim
Thats maybe why it was decided the deck would only contain one
While is pretty steep for a 5/3 creature, when it enters, its first chapter destroys target creature a foe controls, its second chapter is the your foe loses the game one, which is obviously awesome, and the third chapter draws you two cards and forces all players to lose two life
But the tempo loss of having to play this and then move your characters here is too much
My guess is Emerald/Sapphire will lean into the interplay of Big Hero Six characters and the robot classification
And this only gets much, much worse (for the opponent, that is) as time goes on