This card better for a Control deck than an aggro deck because of 3 armor. You see from turn 4 Warrior have a lots of OP removals options but its turn 2-3 are weak since the Winaxe nerf. This card can fix this nicely
Stat/effect to cost is solid. I voted playable. It could be very good though. getting a 2/3 body on a slightly smaller shield block and a lackey instead of card draw is pretty decent. Feels about on an even playing field depending on the deck. For control obviously shield block is better, for a more minion centric style of deck this is better.