Oh my goodness this is a sweet one! Could end up being a staple of control warrior as 3 armor and killing an early drop is pretty fantastic. It also gives you something to do inbetween War Axe and Death's Bite.
I actually really like this. Can replace slam in a midrange or control or dragon warrior deck. Helps deal with early game, can combo with some minions. And we have not seen so many other cards. New archetypes for all classes could make this card even more useful than we may imagine now. But that can really be said about many cards, ha.
I don't like the idea of giving warriors more removal outside of weapons. This may just be meant to help balance minion spell ratio for arena, but having this available the turn after win axe gives warrior some pretty strong early game defense in constructed