Glad to see the new and exciting originality in this design. I will say that Deathstalker Rexxar is going to be overjoyed with the new added pool of beasts.
I feel there is a great irony to this post following at least several others that remarked "Good for DK Rexxar."
That said, a class like Druid that has both Beast and buff synergy, as well as a history of aggressive decks, seems like it could make use of this. I mean, Mark of Y'Shaarj is rotated out, but any attempt to contest this on the board with weak minions could lead to a turn 2 8/3 chicken (give or take health lost from trade).
I know people say this isnt good but I'm still gonna try it in a buff paladin. Remember Crystology can draw it, and each time it's overkill triggers it makes it THAT much easier to trigger the overkill again.